diff --git a/pyproject.toml b/pyproject.toml
index 2003d35c..e4e76d8f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -71,7 +71,7 @@ development = [
     'xenon==0.9.3',
     'types-PyYAML==6.0.12.20250915',
     'codespell==2.4.2',
-    'mypy==1.19.1',
+    'mypy==1.20.0',
     #'flake8==5.0.4', # version 6.x.x requires python >= 3.8.1 (but 3.7 support window is until 2023-06-27)
     'bandit==1.9.4',
     'vulture==2.16',