diff --git a/requirements_test.txt b/requirements_test.txt
index b0f9036..94957a2 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,5 +1,5 @@
 black==19.10b0
-coverage==5.3
+coverage==5.3.1
 flake8==3.8.4
 flake8-docstrings==1.5.0
 pre-commit==2.7.1