diff --git a/antlr4-maven-plugin/pom.xml b/antlr4-maven-plugin/pom.xml
index babc3bb092..d2e885b7d5 100644
--- a/antlr4-maven-plugin/pom.xml
+++ b/antlr4-maven-plugin/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <groupId>org.antlr</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.12.0-SNAPSHOT</version>
+    <version>4.12.0</version>
   </parent>
   <artifactId>antlr4-maven-plugin</artifactId>
   <packaging>maven-plugin</packaging>
diff --git a/pom.xml b/pom.xml
index 90ae0c5087..f6ab70b95f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -13,7 +13,7 @@
 	</parent>
 	<groupId>org.antlr</groupId>
 	<artifactId>antlr4-master</artifactId>
-	<version>4.12.0-SNAPSHOT</version>
+	<version>4.12.0</version>
 	<packaging>pom</packaging>
 
 	<name>ANTLR 4</name>
@@ -98,7 +98,7 @@
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-		<project.build.outputTimestamp>10</project.build.outputTimestamp>
+		<project.build.outputTimestamp>1676838936</project.build.outputTimestamp>
 		<antlr.testinprocess>true</antlr.testinprocess>
 		<maven.compiler.source>11</maven.compiler.source>
 		<maven.compiler.target>11</maven.compiler.target>
@@ -120,7 +120,7 @@
         <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>4.12.0</tag>
 	</scm>
 
 	<build>
diff --git a/runtime-testsuite/pom.xml b/runtime-testsuite/pom.xml
index 915241aae7..69d72abd1a 100644
--- a/runtime-testsuite/pom.xml
+++ b/runtime-testsuite/pom.xml
@@ -10,7 +10,7 @@
 	<parent>
 		<groupId>org.antlr</groupId>
 		<artifactId>antlr4-master</artifactId>
-		<version>4.12.0-SNAPSHOT</version>
+		<version>4.12.0</version>
 	</parent>
 	<artifactId>antlr4-runtime-testsuite</artifactId>
 	<name>ANTLR 4 Runtime Tests (4th generation)</name>
diff --git a/runtime/Java/pom.xml b/runtime/Java/pom.xml
index 9f8111e1ca..4562336355 100644
--- a/runtime/Java/pom.xml
+++ b/runtime/Java/pom.xml
@@ -9,7 +9,7 @@
 	<parent>
 		<groupId>org.antlr</groupId>
 		<artifactId>antlr4-master</artifactId>
-		<version>4.12.0-SNAPSHOT</version>
+		<version>4.12.0</version>
 		<relativePath>../../pom.xml</relativePath>
 	</parent>
 	<artifactId>antlr4-runtime</artifactId>
diff --git a/tool-testsuite/pom.xml b/tool-testsuite/pom.xml
index 2b8e1257b1..9441d65145 100644
--- a/tool-testsuite/pom.xml
+++ b/tool-testsuite/pom.xml
@@ -10,7 +10,7 @@
   <parent>
     <groupId>org.antlr</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.12.0-SNAPSHOT</version>
+    <version>4.12.0</version>
   </parent>
   <artifactId>antlr4-tool-testsuite</artifactId>
   <name>ANTLR 4 Tool Tests</name>
diff --git a/tool/pom.xml b/tool/pom.xml
index 2517e0e267..8018bb6be4 100644
--- a/tool/pom.xml
+++ b/tool/pom.xml
@@ -9,7 +9,7 @@
 	<parent>
 		<groupId>org.antlr</groupId>
 		<artifactId>antlr4-master</artifactId>
-		<version>4.12.0-SNAPSHOT</version>
+		<version>4.12.0</version>
 	</parent>
 	<artifactId>antlr4</artifactId>
 	<name>ANTLR 4 Tool</name>