diff --git a/stubdoc/cli.py b/stubdoc/cli.py
index 075184b..53083cc 100644
--- a/stubdoc/cli.py
+++ b/stubdoc/cli.py
@@ -121,7 +121,7 @@ def _validate_module_path_arg(module_path_arg: Optional[str]) -> None:
     if not os.path.isfile(module_path_arg):
         raise ValueError(
             f'Specified module not found: {module_path_arg}')
-    if not module_path_arg.endswith('.py'):
+    if not os.path.splitext(module_path_arg)[1] in ['.py', '.pyd']:
         raise ValueError(
             f'A non-python module path specified: {module_path_arg}')
 
diff --git a/stubdoc/stubdoc.py b/stubdoc/stubdoc.py
index 5b4e0e2..e2a3adf 100644
--- a/stubdoc/stubdoc.py
+++ b/stubdoc/stubdoc.py
@@ -406,7 +406,7 @@ def _read_module(module_path: str) -> ModuleType:
     file_name: str = os.path.basename(module_path)
     dir_path: str = module_path.replace(file_name, '', 1)
     sys.path.append(dir_path)
-    package_name: str = module_path.replace('.py', '')
+    package_name: str = os.path.splitext(module_path)[0]
     package_name = package_name.replace('/', '.')
     package_name = package_name.replace('\\', '.')
     while package_name.startswith('.'):