diff --git a/pom.xml b/pom.xml
index 8730570..c619893 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@
 
     <groupId>de.77zzcx7.push-service</groupId>
     <artifactId>push-service-parent</artifactId>
-    <version>3</version>
+    <version>4-SNAPSHOT</version>
     <packaging>pom</packaging>
     <description>A micro service to send push notifications</description>
     <name>push-service-parent</name>
@@ -30,7 +30,7 @@
         <!-- Property to define the parallel deployment version.
              See e.g. https://tomcat.apache.org/tomcat-8.5-doc/config/context.html
              Should be the same as the project.version but padded with zeros to six digits. -->
-        <parallelDeploymentVersion>000003</parallelDeploymentVersion>
+        <parallelDeploymentVersion>000004</parallelDeploymentVersion>
     </properties>
 
     <distributionManagement>
diff --git a/push-service-client-lib/pom.xml b/push-service-client-lib/pom.xml
index 1afe84b..f1fe09f 100644
--- a/push-service-client-lib/pom.xml
+++ b/push-service-client-lib/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <artifactId>push-service-parent</artifactId>
         <groupId>de.77zzcx7.push-service</groupId>
-        <version>3</version>
+        <version>4-SNAPSHOT</version>
     </parent>
 
     <artifactId>push-service-client-lib</artifactId>
diff --git a/push-service-server/pom.xml b/push-service-server/pom.xml
index b628e40..6fa3d75 100644
--- a/push-service-server/pom.xml
+++ b/push-service-server/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <artifactId>push-service-parent</artifactId>
         <groupId>de.77zzcx7.push-service</groupId>
-        <version>3</version>
+        <version>4-SNAPSHOT</version>
     </parent>
 
     <artifactId>push-service-server</artifactId>