diff --git a/curator-test-zk38/pom.xml b/curator-test-zk38/pom.xml
index 678206e91..bb9725faf 100644
--- a/curator-test-zk38/pom.xml
+++ b/curator-test-zk38/pom.xml
@@ -32,7 +32,7 @@
     <artifactId>curator-test-zk38</artifactId>
 
     <properties>
-        <zookeeper-38-version>3.8.3</zookeeper-38-version>
+        <zookeeper-38-version>3.8.4</zookeeper-38-version>
     </properties>
 
     <dependencies>
diff --git a/pom.xml b/pom.xml
index ceaddf387..438e7105b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -72,7 +72,7 @@
         <redirectTestOutputToFile>true</redirectTestOutputToFile>
 
         <!-- versions -->
-        <zookeeper-version>3.9.1</zookeeper-version>
+        <zookeeper-version>3.8.4</zookeeper-version>
         <maven-bundle-plugin-version>5.1.4</maven-bundle-plugin-version>
         <maven-compiler-plugin-version>3.10.0</maven-compiler-plugin-version>
         <maven-dependency-plugin-version>3.2.0</maven-dependency-plugin-version>