diff --git a/requirements-test.txt b/requirements-test.txt
index d678ed8e..2a3a8d3d 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -2,7 +2,7 @@ black==21.7b0
 flake8==3.9.*
 freezegun==1.1.*
 isort==5.9.*
-mypy==0.910
+mypy==0.921
 pytest==6.2.*
 pytest-cov==2.12.*
 pytest-vcr==1.0.*