diff --git a/antlr4-maven-plugin/pom.xml b/antlr4-maven-plugin/pom.xml
index 7a446d8c3..4dc311631 100644
--- a/antlr4-maven-plugin/pom.xml
+++ b/antlr4-maven-plugin/pom.xml
@@ -40,7 +40,7 @@
     <parent>
         <groupId>org.antlr</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.2</version>
+        <version>4.2.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>antlr4-maven-plugin</artifactId>
diff --git a/build.xml b/build.xml
index dbd4fd025..80d0c3d33 100644
--- a/build.xml
+++ b/build.xml
@@ -32,7 +32,7 @@
     </target>
 
     <target name="build-init" depends="basic-init">
-        <property name="version" value="4.2"/>
+        <property name="version" value="4.2.1-dev"/>
         <property name="build.sysclasspath" value="ignore"/>
         <property name="install.root.dir" value="${dist.dir}/antlr-${version}" />
         <property name="jar.file" value="${dist.dir}/antlr-${version}-complete.jar" />
diff --git a/pom.xml b/pom.xml
index 1b1302847..071ccee79 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,7 +9,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.antlr</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.2</version>
+    <version>4.2.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>ANTLR 4</name>
@@ -93,7 +93,7 @@
         <url>https://github.com/antlr/antlr4/tree/master</url>
         <connection>scm:git:git://github.com/antlr/antlr4.git</connection>
         <developerConnection>scm:git:git@github.com:antlr/antlr4.git</developerConnection>
-      <tag>4.2</tag>
+      <tag>HEAD</tag>
   </scm>
 
     <profiles>
diff --git a/runtime/Java/pom.xml b/runtime/Java/pom.xml
index 0c8f47a01..bcd439ff7 100644
--- a/runtime/Java/pom.xml
+++ b/runtime/Java/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.antlr</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.2</version>
+        <version>4.2.1-SNAPSHOT</version>
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/runtime/JavaAnnotations/pom.xml b/runtime/JavaAnnotations/pom.xml
index f3e89732e..9c13fe49f 100644
--- a/runtime/JavaAnnotations/pom.xml
+++ b/runtime/JavaAnnotations/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.antlr</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.2</version>
+        <version>4.2.1-SNAPSHOT</version>
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/tool/pom.xml b/tool/pom.xml
index 20ee8ab72..5e580974b 100644
--- a/tool/pom.xml
+++ b/tool/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.antlr</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.2</version>
+        <version>4.2.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>antlr4</artifactId>