diff --git a/docs/codemods/python/pixee_python_safe-bad-lock-with-statement.md b/docs/codemods/python/pixee_python_safe-bad-lock-with-statement.md
index b46f4aa..9a3f4b3 100644
--- a/docs/codemods/python/pixee_python_safe-bad-lock-with-statement.md
+++ b/docs/codemods/python/pixee_python_safe-bad-lock-with-statement.md
@@ -35,3 +35,4 @@ This codemod creates a new variable named `lock` which could clash with another
 
 ## References
 * [https://pylint.pycqa.org/en/latest/user_guide/messages/warning/useless-with-lock.html](https://pylint.pycqa.org/en/latest/user_guide/messages/warning/useless-with-lock.html)
+* [https://docs.python.org/3/library/threading.html#using-locks-conditions-and-semaphores-in-the-with-statement](https://docs.python.org/3/library/threading.html#using-locks-conditions-and-semaphores-in-the-with-statement)