diff --git a/pyproject.toml b/pyproject.toml
index f1412e9..3cb82e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    'mypy==1.4.1',
+    'mypy==1.5.0',
 ]
 publish = [
     'flit==3.9.0',