diff --git a/MANIFEST.MF b/MANIFEST.MF
index 4044607e06904956dc0314b7deb13260350eba6a..12be733fbb2545364044940a21e62aee200e7087 100644
--- a/MANIFEST.MF
+++ b/MANIFEST.MF
@@ -8,4 +8,16 @@ Specification-Vendor: Naval Postgraduate School
 Implementation-Title: edu.nps.moves.dis7
 Implementation-Version: build01
 Implementation-Vendor: Naval Postgraduate School
+Sealed: false
 
+Name: edu/nps/moves/dis7
+Sealed: true
+
+Name: edu/nps/moves/dis7/enumerations
+Sealed: true
+
+Name: edu/nps/moves/dis7/jammers
+Sealed: true
+
+Name: edu/nps/moves/dis7/objecttypes
+Sealed: true