diff --git a/opsin-core/pom.xml b/opsin-core/pom.xml
index 96924e55e..79bb062de 100644
--- a/opsin-core/pom.xml
+++ b/opsin-core/pom.xml
@@ -3,7 +3,7 @@
    <parent>
       <artifactId>opsin</artifactId>
       <groupId>uk.ac.cam.ch.opsin</groupId>
-      <version>2.1-SNAPSHOT</version>
+      <version>2.1.0</version>
    </parent>
   <artifactId>opsin-core</artifactId>
   <name>OPSIN Core</name>
diff --git a/opsin-inchi/pom.xml b/opsin-inchi/pom.xml
index a031d58f7..d961ea22e 100644
--- a/opsin-inchi/pom.xml
+++ b/opsin-inchi/pom.xml
@@ -3,7 +3,7 @@
    <parent>
       <artifactId>opsin</artifactId>
       <groupId>uk.ac.cam.ch.opsin</groupId>
-      <version>2.1-SNAPSHOT</version>
+      <version>2.1.0</version>
    </parent>
   <artifactId>opsin-inchi</artifactId>
   <name>OPSIN_InChI_Support</name>
diff --git a/pom.xml b/pom.xml
index 578747874..c7bb7e3f7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
   </parent>
   <groupId>uk.ac.cam.ch.opsin</groupId>
   <artifactId>opsin</artifactId>
-  <version>2.1-SNAPSHOT</version>
+  <version>2.1.0</version>
   <packaging>pom</packaging>
   <name>OPSIN</name>
   <description>Open Parser for Systematic IUPAC Nomenclature</description>