diff --git a/setup.py b/setup.py
index 1a82b15..98db2c3 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@
 
 setup(
     name="tinyfk",
-    version="0.6.4",
+    version="0.6.5",
     description="a fast kinematics solver",
     author='Hirokazu Ishida',
     license="MIT",