diff --git a/antlr4-maven-plugin/pom.xml b/antlr4-maven-plugin/pom.xml
index 8bdb19072..550e68c72 100644
--- a/antlr4-maven-plugin/pom.xml
+++ b/antlr4-maven-plugin/pom.xml
@@ -13,7 +13,7 @@
     <parent>
         <groupId>com.tunnelvisionlabs</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.6.1-SNAPSHOT</version>
+        <version>4.6.0.1</version>
     </parent>
 
     <artifactId>antlr4-maven-plugin</artifactId>
diff --git a/antlr4-testgen-maven-plugin/pom.xml b/antlr4-testgen-maven-plugin/pom.xml
index 6ffb31658..674ac8ef4 100644
--- a/antlr4-testgen-maven-plugin/pom.xml
+++ b/antlr4-testgen-maven-plugin/pom.xml
@@ -9,7 +9,7 @@
     <parent>
         <groupId>com.tunnelvisionlabs</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.6.1-SNAPSHOT</version>
+        <version>4.6.0.1</version>
     </parent>
 
     <artifactId>antlr4-testgen-maven-plugin</artifactId>
diff --git a/pom.xml b/pom.xml
index 43489390c..535bc1659 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,7 +15,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.tunnelvisionlabs</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.6.1-SNAPSHOT</version>
+    <version>4.6.0.1</version>
     <packaging>pom</packaging>
 
     <name>ANTLR 4</name>
@@ -105,7 +105,7 @@
         <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>HEAD</tag>
+      <tag>4.6.0.1-opt</tag>
   </scm>
 
     <profiles>
diff --git a/runtime-testsuite/pom.xml b/runtime-testsuite/pom.xml
index a7bbebeed..cc93072a4 100644
--- a/runtime-testsuite/pom.xml
+++ b/runtime-testsuite/pom.xml
@@ -10,7 +10,7 @@
     <parent>
         <groupId>com.tunnelvisionlabs</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.6.1-SNAPSHOT</version>
+        <version>4.6.0.1</version>
     </parent>
 
     <artifactId>runtime-testsuite</artifactId>
diff --git a/runtime/Java/pom.xml b/runtime/Java/pom.xml
index c0ea9043e..1ef219884 100644
--- a/runtime/Java/pom.xml
+++ b/runtime/Java/pom.xml
@@ -10,7 +10,7 @@
     <parent>
         <groupId>com.tunnelvisionlabs</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.6.1-SNAPSHOT</version>
+        <version>4.6.0.1</version>
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/runtime/JavaAnnotations/pom.xml b/runtime/JavaAnnotations/pom.xml
index 891b62833..debab0a5d 100644
--- a/runtime/JavaAnnotations/pom.xml
+++ b/runtime/JavaAnnotations/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.tunnelvisionlabs</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.6.1-SNAPSHOT</version>
+        <version>4.6.0.1</version>
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/tool/pom.xml b/tool/pom.xml
index 1fcda10be..5d9e81285 100644
--- a/tool/pom.xml
+++ b/tool/pom.xml
@@ -10,7 +10,7 @@
     <parent>
         <groupId>com.tunnelvisionlabs</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.6.1-SNAPSHOT</version>
+        <version>4.6.0.1</version>
     </parent>
 
     <artifactId>antlr4</artifactId>