diff --git a/pom.xml b/pom.xml
index 4662ecd..514d555 100644
--- a/pom.xml
+++ b/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache</groupId>
     <artifactId>apache</artifactId>
-    <version>29</version>
+    <version>31</version>
     <relativePath/>
   </parent>