diff --git a/src/conf/MANIFEST.MF b/src/conf/MANIFEST.MF
index a43e430b2..381f2c4bd 100644
--- a/src/conf/MANIFEST.MF
+++ b/src/conf/MANIFEST.MF
@@ -2,5 +2,5 @@ Extension-Name: org.apache.commons.collections
 Specification-Vendor: Apache Software Foundation
 Specification-Version: 1.0
 Implementation-Vendor: Apache Software Foundation
-Implementation-Version: 2.0
+Implementation-Version: 2.1