diff --git a/script/bump-version.py b/script/bump-version.py
index fad05fff1a5..c6daf4e26b2 100755
--- a/script/bump-version.py
+++ b/script/bump-version.py
@@ -192,7 +192,8 @@ def update_package_json(version, suffix):
 
 
 def tag_version(version, suffix):
-  execute(['git', 'commit', '-a', '--no-verify', '-m', 'Bump v{0}'.format(version + suffix)])
+  commit_message = 'Bump v{0}'.format(version + suffix)
+  execute(['git', 'commit', '-a', '--no-verify', '-m', commit_message])
 
 
 if __name__ == '__main__':