diff --git a/requirements-test.txt b/requirements-test.txt
index bd8b090..11c7a0a 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,5 +1,5 @@
 pytest-runner==5.3.1
 pytest-flask==1.2.0
 coveralls==3.1.0
-mypy==0.910
+mypy==0.921
 flake8==3.9.2