diff --git a/setup.py b/setup.py
index 438f36b..927b187 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@ def read(fname):
 
 setuptools.setup(
   name="kimimaro",
-  version="4.1.0",
+  version="4.1.1",
   setup_requires=["numpy", "cython"],
   install_requires=[
     "click",