diff --git a/requirements_test.txt b/requirements_test.txt
index d2dc0fe..e61ef02 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,7 +1,7 @@
 black==21.4b0
 codespell==2.0.0
 flake8==3.9.1
-mypy==0.812
+mypy==0.901
 pydocstyle==6.0.0
 cryptography==3.2
 pylint==2.8.2