diff --git a/financer-common/pom.xml b/financer-common/pom.xml
index e8e91dc..51378dc 100644
--- a/financer-common/pom.xml
+++ b/financer-common/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <artifactId>financer-parent</artifactId>
         <groupId>de.77zzcx7.financer</groupId>
-        <version>20</version>
+        <version>21-SNAPSHOT</version>
     </parent>
 
     <artifactId>financer-common</artifactId>
diff --git a/financer-server/pom.xml b/financer-server/pom.xml
index c45f585..1d0d5cc 100644
--- a/financer-server/pom.xml
+++ b/financer-server/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>de.77zzcx7.financer</groupId>
         <artifactId>financer-parent</artifactId>
-        <version>20</version>
+        <version>21-SNAPSHOT</version>
     </parent>
 
     <artifactId>financer-server</artifactId>
diff --git a/financer-web-client/pom.xml b/financer-web-client/pom.xml
index 130760f..dd9469a 100644
--- a/financer-web-client/pom.xml
+++ b/financer-web-client/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>de.77zzcx7.financer</groupId>
         <artifactId>financer-parent</artifactId>
-        <version>20</version>
+        <version>21-SNAPSHOT</version>
     </parent>
 
     <artifactId>financer-web-client</artifactId>
diff --git a/pom.xml b/pom.xml
index a5a9817..d3e6b16 100644
--- a/pom.xml
+++ b/pom.xml
@@ -13,7 +13,7 @@
 
     <groupId>de.77zzcx7.financer</groupId>
     <artifactId>financer-parent</artifactId>
-    <version>20</version>
+    <version>21-SNAPSHOT</version>
     <packaging>pom</packaging>
     <description>The umbrella for all financer projects</description>
     <name>financer-parent</name>
@@ -26,7 +26,7 @@
         <!-- 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>000020</parallelDeploymentVersion>
+        <parallelDeploymentVersion>000021</parallelDeploymentVersion>
     </properties>
 
     <modules>