diff --git a/requirements/test_requirements.txt b/requirements/test_requirements.txt
index c6b54e4..e61ecc6 100644
--- a/requirements/test_requirements.txt
+++ b/requirements/test_requirements.txt
@@ -1,4 +1,4 @@
-mock
+mock==5.2.0
 pytest
 pytest-cov
 flake8