diff --git a/pyproject.toml b/pyproject.toml
index 69098df1..16ec43e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,7 +52,7 @@ tests = [
     "proxy.py",
 ]
 dev = [
-    "mypy==1.17.1",
+    "mypy==1.18.1",
     "scmrepo[tests]",
     "types-certifi",
     "types-mock",