diff --git a/alephclient/api.py b/alephclient/api.py
index cd2742e..1029ec9 100644
--- a/alephclient/api.py
+++ b/alephclient/api.py
@@ -220,7 +220,7 @@ def flush_collection(self, collection_id: str, sync: bool = False):
         url = self._make_url(f"collections/{collection_id}", params=params)
         return self._request("DELETE", url)
 
-    def touch_collection(self, collection_id: str) -> None:
+    def touch_collection(self, collection_id: str):
         """Update the content update date of a collection by ID"""
         url = self._make_url(f"collections/{collection_id}/touch")
         return self._request("POST", url)