diff --git a/src/conf/MANIFEST.MF b/src/conf/MANIFEST.MF
index ba40960e3..d4f7ca211 100644
--- a/src/conf/MANIFEST.MF
+++ b/src/conf/MANIFEST.MF
@@ -1,7 +1,7 @@
 Extension-Name: @name@
 Specification-Title: Jakarta Commons Lang
 Specification-Vendor: Apache Software Foundation
-Specification-Version: 2.0
+Specification-Version: 2.1
 Implementation-Vendor: Apache Software Foundation
 Implementation-Title: org.apache.commons.lang
 Implementation-Version: @version@