diff --git a/pyproject.toml b/pyproject.toml
index cd4af0d8c..a07c78b21 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -76,7 +76,7 @@ actions = [
 ]
 dev = [
     "flit >=3.2.0,<4.0.0",
-    "mypy >=1.19.1,<1.20",
+    "mypy >=1.19.1,<1.21",
     "types-pyyaml >=6.0.4,<7.0.0",
     "types-requests >=2.25.6,<3.0.0",
     "types-jsonschema >=4.22.0,<5.0.0",