diff --git a/antlr4-maven-plugin/pom.xml b/antlr4-maven-plugin/pom.xml
index cc47391d1e..72be13deff 100644
--- a/antlr4-maven-plugin/pom.xml
+++ b/antlr4-maven-plugin/pom.xml
@@ -40,7 +40,7 @@
     <parent>
         <groupId>com.tunnelvisionlabs</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.5-SNAPSHOT</version>
+        <version>4.5</version>
     </parent>
 
     <artifactId>antlr4-maven-plugin</artifactId>
diff --git a/pom.xml b/pom.xml
index e79d9165fe..e377feab0b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,7 +9,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.tunnelvisionlabs</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.5-SNAPSHOT</version>
+    <version>4.5</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>HEAD</tag>
+      <tag>4.5-opt</tag>
   </scm>
 
     <profiles>
diff --git a/runtime/Java/pom.xml b/runtime/Java/pom.xml
index 12053d2e8c..4e1801ec66 100644
--- a/runtime/Java/pom.xml
+++ b/runtime/Java/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.tunnelvisionlabs</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.5-SNAPSHOT</version>
+        <version>4.5</version>
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/runtime/JavaAnnotations/pom.xml b/runtime/JavaAnnotations/pom.xml
index 22cd049dfc..ae17e595ee 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>4.5-SNAPSHOT</version>
+        <version>4.5</version>
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/tool/pom.xml b/tool/pom.xml
index 158c8a9776..475b3888c1 100644
--- a/tool/pom.xml
+++ b/tool/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.tunnelvisionlabs</groupId>
         <artifactId>antlr4-master</artifactId>
-        <version>4.5-SNAPSHOT</version>
+        <version>4.5</version>
     </parent>
 
     <artifactId>antlr4</artifactId>