diff --git a/antlr4-maven-plugin/pom.xml b/antlr4-maven-plugin/pom.xml
index 61d1b1b91..4495a2a21 100644
--- a/antlr4-maven-plugin/pom.xml
+++ b/antlr4-maven-plugin/pom.xml
@@ -34,7 +34,7 @@
   <parent>
     <groupId>org.antlr</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.5.2</version>
+    <version>4.5.2-SNAPSHOT</version>
   </parent>
   <artifactId>antlr4-maven-plugin</artifactId>
   <packaging>maven-plugin</packaging>
diff --git a/pom.xml b/pom.xml
index b08cc99fe..92ca59769 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
   </parent>
   <groupId>org.antlr</groupId>
   <artifactId>antlr4-master</artifactId>
-  <version>4.5.2</version>
+  <version>4.5.2-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>ANTLR 4</name>
diff --git a/runtime-testsuite/pom.xml b/runtime-testsuite/pom.xml
index 4c9da053c..40e2f2a3a 100644
--- a/runtime-testsuite/pom.xml
+++ b/runtime-testsuite/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.antlr</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.5.2</version>
+    <version>4.5.2-SNAPSHOT</version>
   </parent>
   <artifactId>antlr4-runtime-testsuite</artifactId>
   <name>ANTLR 4 Runtime Test Generator</name>
diff --git a/runtime/Java/pom.xml b/runtime/Java/pom.xml
index bcd5c1f62..b9c026525 100644
--- a/runtime/Java/pom.xml
+++ b/runtime/Java/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <groupId>org.antlr</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.5.2</version>
+    <version>4.5.2-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>antlr4-runtime</artifactId>
diff --git a/tool-testsuite/pom.xml b/tool-testsuite/pom.xml
index b7a1debc0..dad48a51c 100644
--- a/tool-testsuite/pom.xml
+++ b/tool-testsuite/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.antlr</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.5.2</version>
+    <version>4.5.2-SNAPSHOT</version>
   </parent>
   <artifactId>antlr4-tool-testsuite</artifactId>
   <name>ANTLR 4 Tool Tests</name>
diff --git a/tool/pom.xml b/tool/pom.xml
index 3067a1939..073f0cbd1 100644
--- a/tool/pom.xml
+++ b/tool/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <groupId>org.antlr</groupId>
     <artifactId>antlr4-master</artifactId>
-    <version>4.5.2</version>
+    <version>4.5.2-SNAPSHOT</version>
   </parent>
   <artifactId>antlr4</artifactId>
   <name>ANTLR 4 Tool</name>