commons-parent 39 -> 40.
diff --git a/pom.xml b/pom.xml
index 1b663d8..7b50d13 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-parent</artifactId>
-    <version>39</version>
+    <version>40</version>
   </parent>
 
   <groupId>org.apache.commons</groupId>