diff --git a/dev-requirements.txt b/dev-requirements.txt
index 611e30f0e..92b76c819 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,5 +1,5 @@
 Flask>=1.1
-mypy==0.931
+mypy==0.971
 mypy-extensions>=0.4.3
 mypy-protobuf>=2.9
 flake8>=3.7.9