diff --git a/setup.py b/setup.py
index d2e6f809dfe7f3995dfb181bc05d84ca6a6073ff..2de437b669de6ef55393c9b17c987208db571102 100644
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,7 @@ extensions = [
 
 
 setup(name='CSSTSim', 
-    version='0.5.2', 
+    version='0.5.3', 
     packages=find_packages(),
     install_requires=[
         'numpy>=1.18.5',