diff --git a/requirements.txt b/requirements.txt
index 7bd7cc9..120e22f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ idna==3.4
 importlib-metadata==5.0.0
 iniconfig==1.1.1
 more-itertools==9.0.0
-mypy==0.982
+mypy==0.991
 mypy-extensions==0.4.3
 ortools==9.4.1874
 packaging==21.3