Switching to openjpa 3.1
diff --git a/pom.xml b/pom.xml
index 4de76ca..93b0079 100644
--- a/pom.xml
+++ b/pom.xml
@@ -85,7 +85,7 @@
 
     <ehcache.version>2.10.6</ehcache.version>
     <hsqldb.version>2.5.0</hsqldb.version>
-    <openjpa.version>2.4.1</openjpa.version>
+    <openjpa.version>3.1.1</openjpa.version>
     <cxf.version>3.0.3</cxf.version>