diff --git a/pyproject.toml b/pyproject.toml
index f6c997bb..9cec56e7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,7 +72,7 @@ mss = "mss.__main__:main"
 dev = [
   "build==1.5.1",
   "lxml==6.1.1",
-  "mypy==2.1.0",
+  "mypy==2.3.0",
   "ruff==0.15.21",
   "twine==6.2.0",
   "typing_extensions==4.16.0",
diff --git a/src/xcbproto/gen_xcb_to_py.py b/src/xcbproto/gen_xcb_to_py.py
index 648a5e4e..58540464 100755
--- a/src/xcbproto/gen_xcb_to_py.py
+++ b/src/xcbproto/gen_xcb_to_py.py
@@ -747,7 +747,7 @@ def lib_for_proto(protocol: str) -> str:
 
 
 def camel_case(name: str, protocol: str | None = None) -> str:
-    prefix = "" if protocol in {"xproto", None} else camel_case(protocol)  # type: ignore[arg-type]
+    prefix = "" if protocol in {"xproto", None} else camel_case(protocol)
     if not name.isupper() and not name.islower():
         # It's already in camel case.
         return prefix + name
@@ -763,7 +763,7 @@ def snake_case(name: str, protocol: str | None = None) -> str:
             "xproto",
             None,
         }
-        else f"{snake_case(protocol)}_"  # type: ignore[arg-type]
+        else f"{snake_case(protocol)}_"
     )
     if name.islower():
         return prefix + name