diff --git a/pyproject.toml b/pyproject.toml
index f9245c0..b97e8eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ source = "scm"
 
 [dependency-groups]
 dev = [
-    "mypy>=1.15.0",
+    "mypy>=1.20.1",
     "pytest>=8.3.4",
     "ruff>=0.9.4",
 ]