diff --git a/pyproject.toml b/pyproject.toml
index 483f1ec4..bc3bdb7e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -71,7 +71,7 @@ dependencies = [
 ]
 
 optional-dependencies.dev = [
-  "mypy==1.19.1",
+  "mypy==1.20.2",
   "tomli",        # Needed even on 3.11+ for typechecking with mypy
   "tox",
 ]