diff --git a/dev-requirements.txt b/dev-requirements.txt
index b90027d..8ef5738 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -2,4 +2,4 @@ pydata-sphinx-theme==0.8.1
 sphinx==5.1.1
 black==22.3.0
 flake8==5.0.4
-mypy==0.950
\ No newline at end of file
+mypy==0.991
\ No newline at end of file