diff --git a/antlr4-maven-plugin/pom.xml b/antlr4-maven-plugin/pom.xml
index 514fef5cf..7a558d032 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>4.3-SNAPSHOT</version>
+        <version>4.3.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>antlr4-maven-plugin</artifactId>
diff --git a/build.xml b/build.xml
index 701e744d7..12380f9b0 100644
--- a/build.xml
+++ b/build.xml
@@ -32,7 +32,7 @@
     </target>
 
     <target name="build-init" depends="basic-init">
-        <property name="version" value="4.3-SNAPSHOT"/>
+        <property name="version" value="4.3.1-SNAPSHOT"/>
         <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 6e2f3f89f..10f735f45 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>4.3-SNAPSHOT</version>
+    <version>4.3.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>ANTLR 4</name>
diff --git a/runtime/Java/pom.xml b/runtime/Java/pom.xml
index eaede9779..305296642 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>4.3-SNAPSHOT</version>
+        <version>4.3.1-SNAPSHOT</version>
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/runtime/Java/src/org/antlr/v4/runtime/RuntimeMetaData.java b/runtime/Java/src/org/antlr/v4/runtime/RuntimeMetaData.java
index 8ae6ee3d0..2dff6b34b 100644
--- a/runtime/Java/src/org/antlr/v4/runtime/RuntimeMetaData.java
+++ b/runtime/Java/src/org/antlr/v4/runtime/RuntimeMetaData.java
@@ -74,7 +74,7 @@ public class RuntimeMetaData {
 	 * libraries to include a literal reference to the version of the ANTLR 4
 	 * runtime library the code was compiled against.</p>
 	 */
-	public static final String VERSION = "4.3-SNAPSHOT";
+	public static final String VERSION = "4.3.1-SNAPSHOT";
 
 	/**
 	 * This class provides detailed information about a mismatch between the
diff --git a/runtime/JavaAnnotations/pom.xml b/runtime/JavaAnnotations/pom.xml
index aba754bc6..e169ce729 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>4.3-SNAPSHOT</version>
+        <version>4.3.1-SNAPSHOT</version>
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/tool/pom.xml b/tool/pom.xml
index 205d69897..1d2a79277 100644
--- a/tool/pom.xml
+++ b/tool/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.antlr</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.3-SNAPSHOT</version>
+        <version>4.3.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>antlr4</artifactId>