diff --git a/requirements_test.txt b/requirements_test.txt
index 4949034b6d9..aff13fe4c3b 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -5,7 +5,7 @@
 -r requirements_test_pre_commit.txt
 asynctest==0.13.0
 codecov==2.0.15
-mock-open==1.3.1
+mock-open==1.4.0
 mypy==0.770
 pre-commit==2.3.0
 pylint==2.4.4