diff --git a/pack.pl b/pack.pl
index 5ffc911..35bff7f 100644
--- a/pack.pl
+++ b/pack.pl
@@ -1,5 +1,5 @@
 name(bddem).
 title('A library for manipulating Binary Decision Diagrams').
-version('4.3.0').
+version('4.3.1').
 author('Fabrizio Riguzzi','fabrizio.riguzzi@unife.it').
 download('https://github.com/friguzzi/bddem/releases/*.zip').