diff --git a/otterdog/providers/github/rest/repo_client.py b/otterdog/providers/github/rest/repo_client.py
index dbbc3bc..a5dec19 100644
--- a/otterdog/providers/github/rest/repo_client.py
+++ b/otterdog/providers/github/rest/repo_client.py
@@ -247,6 +247,7 @@ async def add_repo(
             "topics",
             "gh_pages",
             "code_scanning_default_config",
+            "custom_properties",
         ]
 
         if auto_init_repo is True: