diff --git a/pyproject.toml b/pyproject.toml
index c01fb18..6bbea96 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -58,7 +58,7 @@ dev = [
     "types-PyYAML~=6.0",
     "types-aiofiles~=25.1",
     "pre-commit~=4.5",
-    "mutmut~=3.3",
+    "mutmut~=3.5",
     "radon~=6.0",
     "import-linter~=2.0",
 ]