diff --git a/maven/doxia-tools/site-pom.xml b/maven/doxia-tools/site-pom.xml
index d50d642..d9c5fc6 100644
--- a/maven/doxia-tools/site-pom.xml
+++ b/maven/doxia-tools/site-pom.xml
@@ -25,7 +25,7 @@
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven-parent.</artifactId>
-    <version>30</version>
+    <version>31-SNAPSHOT</version>
     <relativePath>../site-pom.xml</relativePath>
   </parent>
 
diff --git a/maven/maven-archetype-bundles/site-pom.xml b/maven/maven-archetype-bundles/site-pom.xml
index 2b6cacc..aeefcf3 100644
--- a/maven/maven-archetype-bundles/site-pom.xml
+++ b/maven/maven-archetype-bundles/site-pom.xml
@@ -26,7 +26,7 @@
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven-parent.</artifactId>
-    <version>30</version>
+    <version>31-SNAPSHOT</version>
     <relativePath>../site-pom.xml</relativePath>
   </parent>
 
diff --git a/maven/maven-plugins/site-pom.xml b/maven/maven-plugins/site-pom.xml
index 5742f4b..9389f24 100644
--- a/maven/maven-plugins/site-pom.xml
+++ b/maven/maven-plugins/site-pom.xml
@@ -26,7 +26,7 @@
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven-parent.</artifactId>
-    <version>30</version>
+    <version>31-SNAPSHOT</version>
     <relativePath>../site-pom.xml</relativePath>
   </parent>
 
diff --git a/maven/maven-shared-components/site-pom.xml b/maven/maven-shared-components/site-pom.xml
index 49e3345..eaaa845 100644
--- a/maven/maven-shared-components/site-pom.xml
+++ b/maven/maven-shared-components/site-pom.xml
@@ -26,7 +26,7 @@
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven-parent.</artifactId>
-    <version>30</version>
+    <version>31-SNAPSHOT</version>
     <relativePath>../site-pom.xml</relativePath>
   </parent>
 
diff --git a/maven/maven-skins/site-pom.xml b/maven/maven-skins/site-pom.xml
index 867ec58..ad8fbec 100644
--- a/maven/maven-skins/site-pom.xml
+++ b/maven/maven-skins/site-pom.xml
@@ -26,7 +26,7 @@
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven-parent.</artifactId>
-    <version>30</version>
+    <version>31-SNAPSHOT</version>
     <relativePath>../site-pom.xml</relativePath>
   </parent>