diff --git a/infrahub_sdk/ctl/cli_commands.py b/infrahub_sdk/ctl/cli_commands.py
index 43b3497b..fde4b162 100644
--- a/infrahub_sdk/ctl/cli_commands.py
+++ b/infrahub_sdk/ctl/cli_commands.py
@@ -206,7 +206,7 @@ def _run_transform(
     branch: str,
     debug: bool,
     repository_config: InfrahubRepositoryConfig,
-):
+) -> Any:
     """
     Query GraphQL for the required data then run a transform on that data.
 
@@ -382,7 +382,8 @@ def protocols(  # noqa: PLR0915
 
         for data in schemas_data:
             data.load_content()
-            schema_root = SchemaRoot(**data.content)
+            schema_root_data = data.content or {}
+            schema_root = SchemaRoot(**schema_root_data)
             schema.update({item.kind: item for item in schema_root.nodes + schema_root.generics})
 
     else:
@@ -401,7 +402,7 @@ def protocols(  # noqa: PLR0915
 
 @app.command(name="version")
 @catch_exception(console=console)
-def version(_: str = CONFIG_PARAM):
+def version(_: str = CONFIG_PARAM) -> None:
     """Display the version of Infrahub and the version of the Python SDK in use."""
 
     client = initialize_client_sync()
diff --git a/pyproject.toml b/pyproject.toml
index 604ec8e3..47c76750 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -155,10 +155,6 @@ disallow_untyped_defs = true
 module = "infrahub_sdk.ctl.check"
 ignore_errors = true
 
-[[tool.mypy.overrides]]
-module = "infrahub_sdk.ctl.cli_commands"
-ignore_errors = true
-
 [[tool.mypy.overrides]]
 module = "infrahub_sdk.ctl.generator"
 ignore_errors = true