diff --git a/api/pom.xml b/api/pom.xml
index df091ade..87f1a692 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <properties>
     <maven.deploy.skip>true</maven.deploy.skip>
diff --git a/api_dev/pom.xml b/api_dev/pom.xml
index e8f68200..057f8ce5 100644
--- a/api_dev/pom.xml
+++ b/api_dev/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/api_legacy/pom.xml b/api_legacy/pom.xml
index d1dd59b0..47d744cf 100644
--- a/api_legacy/pom.xml
+++ b/api_legacy/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/appengine-api-1.0-sdk/pom.xml b/appengine-api-1.0-sdk/pom.xml
index 79196883..cd6cbbc0 100644
--- a/appengine-api-1.0-sdk/pom.xml
+++ b/appengine-api-1.0-sdk/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>jar</packaging>
   <name>AppEngine :: appengine-api-1.0-sdk</name>
diff --git a/appengine-api-stubs/pom.xml b/appengine-api-stubs/pom.xml
index dd202f85..3f7a96fc 100644
--- a/appengine-api-stubs/pom.xml
+++ b/appengine-api-stubs/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/appengine_init/pom.xml b/appengine_init/pom.xml
index 48dfe9f9..3fe10f5b 100644
--- a/appengine_init/pom.xml
+++ b/appengine_init/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/appengine_jsr107/pom.xml b/appengine_jsr107/pom.xml
index aa604d46..5bf487b8 100644
--- a/appengine_jsr107/pom.xml
+++ b/appengine_jsr107/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <dependencies>
diff --git a/appengine_resources/pom.xml b/appengine_resources/pom.xml
index 294eb762..227d1218 100644
--- a/appengine_resources/pom.xml
+++ b/appengine_resources/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>jar</packaging>
   <name>AppEngine :: appengine-resources</name>
diff --git a/appengine_testing/pom.xml b/appengine_testing/pom.xml
index 6154940a..d01756f8 100644
--- a/appengine_testing/pom.xml
+++ b/appengine_testing/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/appengine_testing_tests/pom.xml b/appengine_testing_tests/pom.xml
index 5ce53736..07739174 100644
--- a/appengine_testing_tests/pom.xml
+++ b/appengine_testing_tests/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/applications/pom.xml b/applications/pom.xml
index 8cc82b84..35efc751 100644
--- a/applications/pom.xml
+++ b/applications/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>pom</packaging>
   <properties>
diff --git a/applications/proberapp/pom.xml b/applications/proberapp/pom.xml
index d11a44ad..ad92d375 100644
--- a/applications/proberapp/pom.xml
+++ b/applications/proberapp/pom.xml
@@ -25,7 +25,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>applications</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
     <properties>
diff --git a/applications/springboot/pom.xml b/applications/springboot/pom.xml
index 3ce7def9..8ffd5500 100644
--- a/applications/springboot/pom.xml
+++ b/applications/springboot/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>applications</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/devappservertests/pom.xml b/e2etests/devappservertests/pom.xml
index 6076fee7..5424e468 100644
--- a/e2etests/devappservertests/pom.xml
+++ b/e2etests/devappservertests/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>e2etests</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/e2etests/pom.xml b/e2etests/pom.xml
index e44f8f70..222b95de 100644
--- a/e2etests/pom.xml
+++ b/e2etests/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <name>AppEngine :: e2e tests</name>
   <packaging>pom</packaging>
diff --git a/e2etests/stagingtests/pom.xml b/e2etests/stagingtests/pom.xml
index a10ac96f..98badecb 100644
--- a/e2etests/stagingtests/pom.xml
+++ b/e2etests/stagingtests/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>e2etests</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/e2etests/testlocalapps/allinone/pom.xml b/e2etests/testlocalapps/allinone/pom.xml
index b787fc05..c9be2534 100644
--- a/e2etests/testlocalapps/allinone/pom.xml
+++ b/e2etests/testlocalapps/allinone/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/allinone_jakarta/pom.xml b/e2etests/testlocalapps/allinone_jakarta/pom.xml
index e0001bd1..80d08ad0 100644
--- a/e2etests/testlocalapps/allinone_jakarta/pom.xml
+++ b/e2etests/testlocalapps/allinone_jakarta/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/badcron/pom.xml b/e2etests/testlocalapps/badcron/pom.xml
index 9e9585a5..a8fe22b6 100644
--- a/e2etests/testlocalapps/badcron/pom.xml
+++ b/e2etests/testlocalapps/badcron/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/bundle_standard/pom.xml b/e2etests/testlocalapps/bundle_standard/pom.xml
index e0b13b22..4fbf6408 100644
--- a/e2etests/testlocalapps/bundle_standard/pom.xml
+++ b/e2etests/testlocalapps/bundle_standard/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>testlocalapps</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/bundle_standard_with_container_initializer/pom.xml b/e2etests/testlocalapps/bundle_standard_with_container_initializer/pom.xml
index da5ff180..c7e2211e 100644
--- a/e2etests/testlocalapps/bundle_standard_with_container_initializer/pom.xml
+++ b/e2etests/testlocalapps/bundle_standard_with_container_initializer/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>testlocalapps</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/bundle_standard_with_no_jsp/pom.xml b/e2etests/testlocalapps/bundle_standard_with_no_jsp/pom.xml
index c529c993..0c6db993 100644
--- a/e2etests/testlocalapps/bundle_standard_with_no_jsp/pom.xml
+++ b/e2etests/testlocalapps/bundle_standard_with_no_jsp/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>testlocalapps</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/bundle_standard_with_weblistener_memcache/pom.xml b/e2etests/testlocalapps/bundle_standard_with_weblistener_memcache/pom.xml
index f0c00925..0eac7588 100644
--- a/e2etests/testlocalapps/bundle_standard_with_weblistener_memcache/pom.xml
+++ b/e2etests/testlocalapps/bundle_standard_with_weblistener_memcache/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>testlocalapps</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/cron-bad-job-age-limit/pom.xml b/e2etests/testlocalapps/cron-bad-job-age-limit/pom.xml
index d2dedb5b..712764a3 100644
--- a/e2etests/testlocalapps/cron-bad-job-age-limit/pom.xml
+++ b/e2etests/testlocalapps/cron-bad-job-age-limit/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/cron-good-retry-parameters/pom.xml b/e2etests/testlocalapps/cron-good-retry-parameters/pom.xml
index 4933e6eb..b9bc1d52 100644
--- a/e2etests/testlocalapps/cron-good-retry-parameters/pom.xml
+++ b/e2etests/testlocalapps/cron-good-retry-parameters/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/cron-negative-max-backoff/pom.xml b/e2etests/testlocalapps/cron-negative-max-backoff/pom.xml
index 8d7bf1e8..91de2a66 100644
--- a/e2etests/testlocalapps/cron-negative-max-backoff/pom.xml
+++ b/e2etests/testlocalapps/cron-negative-max-backoff/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/cron-negative-retry-limit/pom.xml b/e2etests/testlocalapps/cron-negative-retry-limit/pom.xml
index eb14e638..bb8cb813 100644
--- a/e2etests/testlocalapps/cron-negative-retry-limit/pom.xml
+++ b/e2etests/testlocalapps/cron-negative-retry-limit/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/cron-two-max-doublings/pom.xml b/e2etests/testlocalapps/cron-two-max-doublings/pom.xml
index d511bb2f..1eddf3a6 100644
--- a/e2etests/testlocalapps/cron-two-max-doublings/pom.xml
+++ b/e2etests/testlocalapps/cron-two-max-doublings/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/http-headers/pom.xml b/e2etests/testlocalapps/http-headers/pom.xml
index 0763457e..ef314062 100644
--- a/e2etests/testlocalapps/http-headers/pom.xml
+++ b/e2etests/testlocalapps/http-headers/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/java8-jar/pom.xml b/e2etests/testlocalapps/java8-jar/pom.xml
index 188ece4a..08f56d61 100644
--- a/e2etests/testlocalapps/java8-jar/pom.xml
+++ b/e2etests/testlocalapps/java8-jar/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/java8-no-webxml/pom.xml b/e2etests/testlocalapps/java8-no-webxml/pom.xml
index 5945632c..27cf4c63 100644
--- a/e2etests/testlocalapps/java8-no-webxml/pom.xml
+++ b/e2etests/testlocalapps/java8-no-webxml/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/pom.xml b/e2etests/testlocalapps/pom.xml
index 9c569b6f..c93a49d8 100644
--- a/e2etests/testlocalapps/pom.xml
+++ b/e2etests/testlocalapps/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>e2etests</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>pom</packaging>
   <properties>
diff --git a/e2etests/testlocalapps/sample-badaeweb/pom.xml b/e2etests/testlocalapps/sample-badaeweb/pom.xml
index 62aaf0b8..df72695c 100644
--- a/e2etests/testlocalapps/sample-badaeweb/pom.xml
+++ b/e2etests/testlocalapps/sample-badaeweb/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-baddispatch-yaml/pom.xml b/e2etests/testlocalapps/sample-baddispatch-yaml/pom.xml
index ee84f20c..55732f6e 100644
--- a/e2etests/testlocalapps/sample-baddispatch-yaml/pom.xml
+++ b/e2etests/testlocalapps/sample-baddispatch-yaml/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-baddispatch/pom.xml b/e2etests/testlocalapps/sample-baddispatch/pom.xml
index 0a1516ca..ba4988f8 100644
--- a/e2etests/testlocalapps/sample-baddispatch/pom.xml
+++ b/e2etests/testlocalapps/sample-baddispatch/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-badentrypoint/pom.xml b/e2etests/testlocalapps/sample-badentrypoint/pom.xml
index d60dc672..40596b65 100644
--- a/e2etests/testlocalapps/sample-badentrypoint/pom.xml
+++ b/e2etests/testlocalapps/sample-badentrypoint/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-badindexes/pom.xml b/e2etests/testlocalapps/sample-badindexes/pom.xml
index e1b94c8d..2c773771 100644
--- a/e2etests/testlocalapps/sample-badindexes/pom.xml
+++ b/e2etests/testlocalapps/sample-badindexes/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-badruntimechannel/pom.xml b/e2etests/testlocalapps/sample-badruntimechannel/pom.xml
index 0fb88b2b..e336fbeb 100644
--- a/e2etests/testlocalapps/sample-badruntimechannel/pom.xml
+++ b/e2etests/testlocalapps/sample-badruntimechannel/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-badweb/pom.xml b/e2etests/testlocalapps/sample-badweb/pom.xml
index 27e866a5..7770a3d0 100644
--- a/e2etests/testlocalapps/sample-badweb/pom.xml
+++ b/e2etests/testlocalapps/sample-badweb/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-default-auto-ids/pom.xml b/e2etests/testlocalapps/sample-default-auto-ids/pom.xml
index bba3e1cc..7ce8ae5d 100644
--- a/e2etests/testlocalapps/sample-default-auto-ids/pom.xml
+++ b/e2etests/testlocalapps/sample-default-auto-ids/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-error-in-tag-file/pom.xml b/e2etests/testlocalapps/sample-error-in-tag-file/pom.xml
index 234f2c9f..11716c23 100644
--- a/e2etests/testlocalapps/sample-error-in-tag-file/pom.xml
+++ b/e2etests/testlocalapps/sample-error-in-tag-file/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-java11/pom.xml b/e2etests/testlocalapps/sample-java11/pom.xml
index c413c8b3..6df394c5 100644
--- a/e2etests/testlocalapps/sample-java11/pom.xml
+++ b/e2etests/testlocalapps/sample-java11/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-java17/pom.xml b/e2etests/testlocalapps/sample-java17/pom.xml
index e0650a51..d4ed7860 100644
--- a/e2etests/testlocalapps/sample-java17/pom.xml
+++ b/e2etests/testlocalapps/sample-java17/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-jsptaglibrary/pom.xml b/e2etests/testlocalapps/sample-jsptaglibrary/pom.xml
index 0ba139d3..f6e85222 100644
--- a/e2etests/testlocalapps/sample-jsptaglibrary/pom.xml
+++ b/e2etests/testlocalapps/sample-jsptaglibrary/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-jspx/pom.xml b/e2etests/testlocalapps/sample-jspx/pom.xml
index a8771f65..7a813f1a 100644
--- a/e2etests/testlocalapps/sample-jspx/pom.xml
+++ b/e2etests/testlocalapps/sample-jspx/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-legacy-auto-ids/pom.xml b/e2etests/testlocalapps/sample-legacy-auto-ids/pom.xml
index 3e365a68..ca4673f0 100644
--- a/e2etests/testlocalapps/sample-legacy-auto-ids/pom.xml
+++ b/e2etests/testlocalapps/sample-legacy-auto-ids/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-missingappid/pom.xml b/e2etests/testlocalapps/sample-missingappid/pom.xml
index ea1b4637..2d48e760 100644
--- a/e2etests/testlocalapps/sample-missingappid/pom.xml
+++ b/e2etests/testlocalapps/sample-missingappid/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-nojsps/pom.xml b/e2etests/testlocalapps/sample-nojsps/pom.xml
index bd6d81e6..ff543598 100644
--- a/e2etests/testlocalapps/sample-nojsps/pom.xml
+++ b/e2etests/testlocalapps/sample-nojsps/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-unspecified-auto-ids/pom.xml b/e2etests/testlocalapps/sample-unspecified-auto-ids/pom.xml
index cd634719..1128016a 100644
--- a/e2etests/testlocalapps/sample-unspecified-auto-ids/pom.xml
+++ b/e2etests/testlocalapps/sample-unspecified-auto-ids/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sample-with-classes/pom.xml b/e2etests/testlocalapps/sample-with-classes/pom.xml
index 8278123e..f9a8f1c3 100644
--- a/e2etests/testlocalapps/sample-with-classes/pom.xml
+++ b/e2etests/testlocalapps/sample-with-classes/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sampleapp-automatic-module/pom.xml b/e2etests/testlocalapps/sampleapp-automatic-module/pom.xml
index 71bb5792..cc0e2a12 100644
--- a/e2etests/testlocalapps/sampleapp-automatic-module/pom.xml
+++ b/e2etests/testlocalapps/sampleapp-automatic-module/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sampleapp-backends/pom.xml b/e2etests/testlocalapps/sampleapp-backends/pom.xml
index e3395a37..2dd9d359 100644
--- a/e2etests/testlocalapps/sampleapp-backends/pom.xml
+++ b/e2etests/testlocalapps/sampleapp-backends/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
     <name>AppEngine :: sampleapp-backends</name>
diff --git a/e2etests/testlocalapps/sampleapp-basic-module/pom.xml b/e2etests/testlocalapps/sampleapp-basic-module/pom.xml
index 93bd00fe..ffe1dd71 100644
--- a/e2etests/testlocalapps/sampleapp-basic-module/pom.xml
+++ b/e2etests/testlocalapps/sampleapp-basic-module/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sampleapp-manual-module/pom.xml b/e2etests/testlocalapps/sampleapp-manual-module/pom.xml
index b9fa8ec3..12b70a3a 100644
--- a/e2etests/testlocalapps/sampleapp-manual-module/pom.xml
+++ b/e2etests/testlocalapps/sampleapp-manual-module/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sampleapp-runtime/pom.xml b/e2etests/testlocalapps/sampleapp-runtime/pom.xml
index f3b27455..b80d605b 100644
--- a/e2etests/testlocalapps/sampleapp-runtime/pom.xml
+++ b/e2etests/testlocalapps/sampleapp-runtime/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/sampleapp/pom.xml b/e2etests/testlocalapps/sampleapp/pom.xml
index 8639f48b..876c3e5c 100644
--- a/e2etests/testlocalapps/sampleapp/pom.xml
+++ b/e2etests/testlocalapps/sampleapp/pom.xml
@@ -24,7 +24,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <name>AppEngine :: sampleapp</name>
 
diff --git a/e2etests/testlocalapps/stage-sampleapp/pom.xml b/e2etests/testlocalapps/stage-sampleapp/pom.xml
index 6f42831c..3266ca8a 100644
--- a/e2etests/testlocalapps/stage-sampleapp/pom.xml
+++ b/e2etests/testlocalapps/stage-sampleapp/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/stage-with-staging-options/pom.xml b/e2etests/testlocalapps/stage-with-staging-options/pom.xml
index ea1a56f3..0671893d 100644
--- a/e2etests/testlocalapps/stage-with-staging-options/pom.xml
+++ b/e2etests/testlocalapps/stage-with-staging-options/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
 
diff --git a/e2etests/testlocalapps/xmlorder/pom.xml b/e2etests/testlocalapps/xmlorder/pom.xml
index d9e7d061..8fc71fb6 100644
--- a/e2etests/testlocalapps/xmlorder/pom.xml
+++ b/e2etests/testlocalapps/xmlorder/pom.xml
@@ -23,7 +23,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>testlocalapps</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <packaging>war</packaging>
     <name>AppEngine :: xmlorder</name>
diff --git a/external/geronimo_javamail/pom.xml b/external/geronimo_javamail/pom.xml
index 542f5058..572e20b3 100644
--- a/external/geronimo_javamail/pom.xml
+++ b/external/geronimo_javamail/pom.xml
@@ -22,14 +22,14 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
     <artifactId>geronimo-javamail_1.4_spec</artifactId>
     <packaging>jar</packaging>
     <name>AppEngine :: JavaMail 1.4</name>
-    <version>1.4.4-2.0.27</version>
+    <version>1.4.4-3.0.27-SNAPSHOT</version>
 
     <description>Javamail 1.4 Specification with AppEngine updates.</description>
 
diff --git a/jetty12_assembly/pom.xml b/jetty12_assembly/pom.xml
index 49337e74..dea1b376 100644
--- a/jetty12_assembly/pom.xml
+++ b/jetty12_assembly/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>jetty12-assembly</artifactId>
diff --git a/lib/pom.xml b/lib/pom.xml
index 21a6ceb6..6bff51a6 100644
--- a/lib/pom.xml
+++ b/lib/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>pom</packaging>
 
diff --git a/lib/tools_api/pom.xml b/lib/tools_api/pom.xml
index 95384414..baebdf60 100644
--- a/lib/tools_api/pom.xml
+++ b/lib/tools_api/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>lib-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/lib/xml_validator/pom.xml b/lib/xml_validator/pom.xml
index ecbcb869..10861bd3 100644
--- a/lib/xml_validator/pom.xml
+++ b/lib/xml_validator/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>lib-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>jar</packaging>
   <name>AppEngine :: libxmlvalidator</name>
diff --git a/lib/xml_validator_test/pom.xml b/lib/xml_validator_test/pom.xml
index d41ee6bf..012a0f9d 100644
--- a/lib/xml_validator_test/pom.xml
+++ b/lib/xml_validator_test/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>lib-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>jar</packaging>
   <name>AppEngine :: libxmlvalidator_test</name>
diff --git a/local_runtime_shared_jetty12/pom.xml b/local_runtime_shared_jetty12/pom.xml
index 0b1c00ff..ad0ffb86 100644
--- a/local_runtime_shared_jetty12/pom.xml
+++ b/local_runtime_shared_jetty12/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>jar</packaging>
   <name>AppEngine :: appengine-local-runtime-shared Jetty12</name>
diff --git a/local_runtime_shared_jetty9/pom.xml b/local_runtime_shared_jetty9/pom.xml
index b1278a76..59538ed2 100644
--- a/local_runtime_shared_jetty9/pom.xml
+++ b/local_runtime_shared_jetty9/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>jar</packaging>
   <name>AppEngine :: appengine-local-runtime-shared Jetty9</name>
diff --git a/pom.xml b/pom.xml
index 6fa7570c..23579270 100644
--- a/pom.xml
+++ b/pom.xml
@@ -19,7 +19,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.appengine</groupId>
   <artifactId>parent</artifactId>
-  <version>2.0.27</version>
+  <version>2.0.28-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>AppEngine :: Parent project</name>
   <modules>
@@ -74,7 +74,7 @@
     <connection>scm:git:git://github.com/GoogleCloudPlatform/appengine-java-standard.git</connection>
     <url>https://github.com/GoogleCloudPlatform/appengine-java-standard</url>
     <developerConnection>scm:git:ssh://git@github.com/GoogleCloudPlatform/appengine-java-standard.git</developerConnection>
-    <tag>parent-2.0.27</tag>
+    <tag>HEAD</tag>
   </scm>
   <licenses>
       <license>
diff --git a/protobuf/pom.xml b/protobuf/pom.xml
index 400f2c5f..28bcdae3 100644
--- a/protobuf/pom.xml
+++ b/protobuf/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/quickstartgenerator/pom.xml b/quickstartgenerator/pom.xml
index af7a2211..cd3eab0d 100644
--- a/quickstartgenerator/pom.xml
+++ b/quickstartgenerator/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/quickstartgenerator_jetty12/pom.xml b/quickstartgenerator_jetty12/pom.xml
index d4632cb7..84c26eba 100644
--- a/quickstartgenerator_jetty12/pom.xml
+++ b/quickstartgenerator_jetty12/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/quickstartgenerator_jetty12_ee10/pom.xml b/quickstartgenerator_jetty12_ee10/pom.xml
index 7242fb2e..e88feed1 100644
--- a/quickstartgenerator_jetty12_ee10/pom.xml
+++ b/quickstartgenerator_jetty12_ee10/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/remoteapi/pom.xml b/remoteapi/pom.xml
index 804b801e..5b820ced 100644
--- a/remoteapi/pom.xml
+++ b/remoteapi/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <packaging>jar</packaging>
   <name>AppEngine :: appengine-remote-api</name>
diff --git a/runtime/annotationscanningwebapp/pom.xml b/runtime/annotationscanningwebapp/pom.xml
index 7ae5eb36..34aabdd7 100644
--- a/runtime/annotationscanningwebapp/pom.xml
+++ b/runtime/annotationscanningwebapp/pom.xml
@@ -21,7 +21,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>runtime-parent</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <groupId>com.google.appengine.demos</groupId>
     <artifactId>annotationscanningwebapp</artifactId>
diff --git a/runtime/deployment/pom.xml b/runtime/deployment/pom.xml
index c4ea88a0..df0d4e05 100644
--- a/runtime/deployment/pom.xml
+++ b/runtime/deployment/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>runtime-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>pom</packaging>
diff --git a/runtime/failinitfilterwebapp/pom.xml b/runtime/failinitfilterwebapp/pom.xml
index 291dbb66..58bd9ac5 100644
--- a/runtime/failinitfilterwebapp/pom.xml
+++ b/runtime/failinitfilterwebapp/pom.xml
@@ -21,7 +21,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>runtime-parent</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <groupId>com.google.appengine.demos</groupId>
     <artifactId>failinitfilterwebapp</artifactId>
diff --git a/runtime/impl/pom.xml b/runtime/impl/pom.xml
index d6691752..1a7215bc 100644
--- a/runtime/impl/pom.xml
+++ b/runtime/impl/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>runtime-parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/runtime/local_jetty12/pom.xml b/runtime/local_jetty12/pom.xml
index fb2d652d..864d865b 100644
--- a/runtime/local_jetty12/pom.xml
+++ b/runtime/local_jetty12/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>runtime-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/runtime/local_jetty12_ee10/pom.xml b/runtime/local_jetty12_ee10/pom.xml
index 2e7d8cfe..e66d220a 100644
--- a/runtime/local_jetty12_ee10/pom.xml
+++ b/runtime/local_jetty12_ee10/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>runtime-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/runtime/local_jetty9/pom.xml b/runtime/local_jetty9/pom.xml
index cf060445..735783f4 100644
--- a/runtime/local_jetty9/pom.xml
+++ b/runtime/local_jetty9/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>runtime-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/runtime/main/pom.xml b/runtime/main/pom.xml
index a974e1a6..e520e647 100644
--- a/runtime/main/pom.xml
+++ b/runtime/main/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>runtime-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/runtime/nogaeapiswebapp/pom.xml b/runtime/nogaeapiswebapp/pom.xml
index b1e76dba..44f8caee 100644
--- a/runtime/nogaeapiswebapp/pom.xml
+++ b/runtime/nogaeapiswebapp/pom.xml
@@ -21,7 +21,7 @@
     <parent>
       <groupId>com.google.appengine</groupId>
       <artifactId>runtime-parent</artifactId>
-      <version>2.0.27</version>
+      <version>2.0.28-SNAPSHOT</version>
     </parent>
     <groupId>com.google.appengine.demos</groupId>
     <artifactId>nogaeapiswebapp</artifactId>
diff --git a/runtime/pom.xml b/runtime/pom.xml
index 5b9df2b9..b23e2a77 100644
--- a/runtime/pom.xml
+++ b/runtime/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <name>AppEngine :: runtime projects</name>
   <packaging>pom</packaging>
diff --git a/runtime/runtime_impl_jetty12/pom.xml b/runtime/runtime_impl_jetty12/pom.xml
index 57e3197b..ea9b0665 100644
--- a/runtime/runtime_impl_jetty12/pom.xml
+++ b/runtime/runtime_impl_jetty12/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>runtime-parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/runtime/runtime_impl_jetty9/pom.xml b/runtime/runtime_impl_jetty9/pom.xml
index 2390bce0..6f52c368 100644
--- a/runtime/runtime_impl_jetty9/pom.xml
+++ b/runtime/runtime_impl_jetty9/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>runtime-parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/runtime/test/pom.xml b/runtime/test/pom.xml
index e950a0ee..eda026ae 100644
--- a/runtime/test/pom.xml
+++ b/runtime/test/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>runtime-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/runtime/testapps/pom.xml b/runtime/testapps/pom.xml
index c16961bd..bf52e769 100644
--- a/runtime/testapps/pom.xml
+++ b/runtime/testapps/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>runtime-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/runtime/util/pom.xml b/runtime/util/pom.xml
index 91700475..c4ddcac0 100644
--- a/runtime/util/pom.xml
+++ b/runtime/util/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>runtime-parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/runtime_shared/pom.xml b/runtime_shared/pom.xml
index 78b1d5c0..815ec9b3 100644
--- a/runtime_shared/pom.xml
+++ b/runtime_shared/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/runtime_shared_jetty12/pom.xml b/runtime_shared_jetty12/pom.xml
index b8e7d0b3..6ad5ed83 100644
--- a/runtime_shared_jetty12/pom.xml
+++ b/runtime_shared_jetty12/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/runtime_shared_jetty12_ee10/pom.xml b/runtime_shared_jetty12_ee10/pom.xml
index 12f24048..da43d0e3 100644
--- a/runtime_shared_jetty12_ee10/pom.xml
+++ b/runtime_shared_jetty12_ee10/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/runtime_shared_jetty9/pom.xml b/runtime_shared_jetty9/pom.xml
index 37f9e923..d74fd569 100644
--- a/runtime_shared_jetty9/pom.xml
+++ b/runtime_shared_jetty9/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/sdk_assembly/pom.xml b/sdk_assembly/pom.xml
index 79b81e4e..625933ee 100644
--- a/sdk_assembly/pom.xml
+++ b/sdk_assembly/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>appengine-java-sdk</artifactId>
diff --git a/sessiondata/pom.xml b/sessiondata/pom.xml
index 25dea578..d08c9b45 100644
--- a/sessiondata/pom.xml
+++ b/sessiondata/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
 
   <packaging>jar</packaging>
diff --git a/shared_sdk/pom.xml b/shared_sdk/pom.xml
index 2f27ed9d..e2ab698d 100644
--- a/shared_sdk/pom.xml
+++ b/shared_sdk/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/shared_sdk_jetty12/pom.xml b/shared_sdk_jetty12/pom.xml
index 7335e1b3..a8401ff9 100644
--- a/shared_sdk_jetty12/pom.xml
+++ b/shared_sdk_jetty12/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/shared_sdk_jetty9/pom.xml b/shared_sdk_jetty9/pom.xml
index 6c4997ae..4f57255f 100644
--- a/shared_sdk_jetty9/pom.xml
+++ b/shared_sdk_jetty9/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>com.google.appengine</groupId>
         <artifactId>parent</artifactId>
-        <version>2.0.27</version>
+        <version>2.0.28-SNAPSHOT</version>
     </parent>
 
     <packaging>jar</packaging>
diff --git a/utils/pom.xml b/utils/pom.xml
index afc9e2b9..80a8d53f 100644
--- a/utils/pom.xml
+++ b/utils/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>com.google.appengine</groupId>
     <artifactId>parent</artifactId>
-    <version>2.0.27</version>
+    <version>2.0.28-SNAPSHOT</version>
   </parent>
   <properties>
     <maven.deploy.skip>true</maven.deploy.skip>