diff --git a/backing-collections/pom.xml b/backing-collections/pom.xml
index aad880b..ebfb1ca 100644
--- a/backing-collections/pom.xml
+++ b/backing-collections/pom.xml
@@ -5,12 +5,12 @@
   <parent>
     <groupId>com.selectivem.collections</groupId>
     <artifactId>collections</artifactId>
-    <version>${revision}</version>
+    <version>1.2.1</version>
   </parent>
 
   <groupId>com.selectivem.collections</groupId>
   <artifactId>backing-collections</artifactId>
-  <version>${revision}</version>
+  <version>1.2.1</version>
   <packaging>jar</packaging>
   <name>${project.groupId}:${project.artifactId}</name>
   <description>Backing collection implementations used by com.selectivem.collections</description>
diff --git a/checklists/pom.xml b/checklists/pom.xml
index 92e52a9..b299d14 100644
--- a/checklists/pom.xml
+++ b/checklists/pom.xml
@@ -5,12 +5,12 @@
   <parent>
     <groupId>com.selectivem.collections</groupId>
     <artifactId>collections</artifactId>
-    <version>${revision}</version>
+    <version>1.2.1</version>
   </parent>
 
   <groupId>com.selectivem.collections</groupId>
   <artifactId>checklists</artifactId>
-  <version>${revision}</version>
+  <version>1.2.1</version>
   <packaging>jar</packaging>
   <name>${project.groupId}:${project.artifactId}</name>
   <description>Dedicated check list and check table data structures</description>
diff --git a/compact-subsets/pom.xml b/compact-subsets/pom.xml
index d95a225..05d845a 100644
--- a/compact-subsets/pom.xml
+++ b/compact-subsets/pom.xml
@@ -5,12 +5,12 @@
   <parent>
     <groupId>com.selectivem.collections</groupId>
     <artifactId>collections</artifactId>
-    <version>${revision}</version>
+    <version>1.2.1</version>
   </parent>
 
   <groupId>com.selectivem.collections</groupId>
   <artifactId>compact-subsets</artifactId>
-  <version>${revision}</version>
+  <version>1.2.1</version>
   <packaging>jar</packaging>
   <name>${project.groupId}:${project.artifactId}</name>
   <description>Set implementations that allow heap-efficient subsets of other sets</description>
diff --git a/interfaces/pom.xml b/interfaces/pom.xml
index 731a815..5f3b4ef 100644
--- a/interfaces/pom.xml
+++ b/interfaces/pom.xml
@@ -5,12 +5,12 @@
   <parent>
     <groupId>com.selectivem.collections</groupId>
     <artifactId>collections</artifactId>
-    <version>${revision}</version>
+    <version>1.2.1</version>
   </parent>
 
   <groupId>com.selectivem.collections</groupId>
   <artifactId>interfaces</artifactId>
-  <version>${revision}</version>
+  <version>1.2.1</version>
   <packaging>jar</packaging>
   <name>${project.groupId}:${project.artifactId}</name>
   <description>Pure Java interface definitions for specialized collections</description>
diff --git a/pom.xml b/pom.xml
index f515f13..26b9661 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
   <groupId>com.selectivem.collections</groupId>
   <artifactId>collections</artifactId>
-  <version>${revision}</version>
+  <version>1.2.1</version>
   <packaging>pom</packaging>
   <name>${project.groupId}:${project.artifactId}</name>
   <description>Specialized collection implementations</description>
@@ -51,7 +51,7 @@
   </distributionManagement>
 
   <properties>
-    <revision>1.2.1-SNAPSHOT</revision>
+    <revision>1.2.1</revision>
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.release>8</maven.compiler.release>