diff --git a/setup.py b/setup.py
index c47992a..9f459bd 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 setup(
   name = 'simpful',
   packages = ['simpful'], # this must be the same as the name above
-  version = '2.5.3',
+  version = '2.5.4',
   description = 'A user-friendly Python library for fuzzy logic',
   author = 'Marco S. Nobile',
   author_email = 'marco.nobile@unive.it',