diff --git a/java/carrier/pom.xml b/java/carrier/pom.xml
index fa3a8cad6..e55f745a8 100644
--- a/java/carrier/pom.xml
+++ b/java/carrier/pom.xml
@@ -10,7 +10,7 @@
   <parent>
     <groupId>com.googlecode.libphonenumber</groupId>
     <artifactId>libphonenumber-parent</artifactId>
-    <version>6.4-SNAPSHOT</version>
+    <version>6.3.1-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -34,7 +34,7 @@
     <dependency>
       <groupId>com.googlecode.libphonenumber</groupId>
       <artifactId>libphonenumber</artifactId>
-      <version>6.4-SNAPSHOT</version>
+      <version>6.3.1-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>com.googlecode.libphonenumber</groupId>
diff --git a/java/demo/pom.xml b/java/demo/pom.xml
index 6b85388c5..042bcd75d 100644
--- a/java/demo/pom.xml
+++ b/java/demo/pom.xml
@@ -4,11 +4,11 @@
   <parent>
     <artifactId>libphonenumber-parent</artifactId>
     <groupId>com.googlecode.libphonenumber</groupId>
-    <version>6.4-SNAPSHOT</version>
+    <version>6.3.1-SNAPSHOT</version>
   </parent>
   <groupId>com.googlecode.libphonenumber</groupId>
   <artifactId>demo</artifactId>
-  <version>6.4-SNAPSHOT</version>
+  <version>6.3.1-SNAPSHOT</version>
 
   <properties>
     <gae.version>1.5.4</gae.version>
@@ -43,7 +43,7 @@
     <dependency>
       <groupId>com.googlecode.libphonenumber</groupId>
       <artifactId>libphonenumber</artifactId>
-      <version>6.4-SNAPSHOT</version>
+      <version>6.3.1-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>com.googlecode.libphonenumber</groupId>
diff --git a/java/geocoder/pom.xml b/java/geocoder/pom.xml
index 543b85ebc..db5ccee78 100644
--- a/java/geocoder/pom.xml
+++ b/java/geocoder/pom.xml
@@ -10,7 +10,7 @@
   <parent>
     <groupId>com.googlecode.libphonenumber</groupId>
     <artifactId>libphonenumber-parent</artifactId>
-    <version>6.4-SNAPSHOT</version>
+    <version>6.3.1-SNAPSHOT</version>
   </parent>
 
   <build>
@@ -42,7 +42,7 @@
     <dependency>
       <groupId>com.googlecode.libphonenumber</groupId>
       <artifactId>libphonenumber</artifactId>
-      <version>6.4-SNAPSHOT</version>
+      <version>6.3.1-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>com.googlecode.libphonenumber</groupId>
diff --git a/java/internal/prefixmapper/pom.xml b/java/internal/prefixmapper/pom.xml
index 06480b7bd..f0c9ccac4 100644
--- a/java/internal/prefixmapper/pom.xml
+++ b/java/internal/prefixmapper/pom.xml
@@ -10,7 +10,7 @@
   <parent>
     <groupId>com.googlecode.libphonenumber</groupId>
     <artifactId>libphonenumber-parent</artifactId>
-    <version>6.4-SNAPSHOT</version>
+    <version>6.3.1-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.googlecode.libphonenumber</groupId>
       <artifactId>libphonenumber</artifactId>
-      <version>6.4-SNAPSHOT</version>
+      <version>6.3.1-SNAPSHOT</version>
     </dependency>
   </dependencies>
 
diff --git a/java/libphonenumber/pom.xml b/java/libphonenumber/pom.xml
index ecb0efde5..37d00a86f 100644
--- a/java/libphonenumber/pom.xml
+++ b/java/libphonenumber/pom.xml
@@ -3,14 +3,14 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.googlecode.libphonenumber</groupId>
   <artifactId>libphonenumber</artifactId>
-  <version>6.4-SNAPSHOT</version>
+  <version>6.3.1-SNAPSHOT</version>
   <packaging>jar</packaging>
   <url>http://code.google.com/p/libphonenumber/</url>
 
   <parent>
     <groupId>com.googlecode.libphonenumber</groupId>
     <artifactId>libphonenumber-parent</artifactId>
-    <version>6.4-SNAPSHOT</version>
+    <version>6.3.1-SNAPSHOT</version>
   </parent>
 
   <build>
diff --git a/java/pom.xml b/java/pom.xml
index e3b532bb7..1c40f345b 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.googlecode.libphonenumber</groupId>
   <artifactId>libphonenumber-parent</artifactId>
-  <version>6.4-SNAPSHOT</version>
+  <version>6.3.1-SNAPSHOT</version>
   <packaging>pom</packaging>
   <url>http://code.google.com/p/libphonenumber/</url>