diff --git a/requirements_dev.txt b/requirements_dev.txt
index 8c13865..71f1184 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -3,7 +3,7 @@ black==21.12b0
 coverage==6.2
 flake8==4.0.1
 lxml==4.7.1
-mypy==0.910
+mypy==0.920
 pylint==2.12.2
 pytest==6.2.5
 pytest-asyncio==0.16.0