diff --git a/awsgi/__init__.py b/awsgi/__init__.py
index 80c489e..75b41c9 100644
--- a/awsgi/__init__.py
+++ b/awsgi/__init__.py
@@ -36,7 +36,7 @@ def __call__(self, status, headers, exc_info=None):
     def response(self, output):
         return {
             'isBase64Encoded': False,
-            'statusCode': str(self.status),
+            'statusCode': int(self.status),
             'headers': dict(self.headers),
             'body': self.body.getvalue() + ''.join(map(convert_str, output)),
         }