diff --git a/setup.py b/setup.py
index 43981a6..cbf21b8 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setup(
     name='zoopt',
-    version='0.2.2',
+    version='0.2.3',
     description=(
         'A Python Package for Zeroth-Order Optimization'
     ),