diff --git a/pyproject.toml b/pyproject.toml
index 9a4fcdb..b0912ec 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ dependencies = ["specklepy==3.1.0"]
 
 [project.optional-dependencies]
 dev = [
-    "mypy==1.13.0",
+    "mypy==1.19.0",
     "pytest==7.4.4",
     "ruff==0.11.12",
 ]