diff --git a/notion_client/api_endpoints.py b/notion_client/api_endpoints.py
index fdd4ab1..36a839c 100644
--- a/notion_client/api_endpoints.py
+++ b/notion_client/api_endpoints.py
@@ -226,10 +226,15 @@ def update(self, page_id: str, **kwargs: Any) -> SyncAsync[Any]:
 
         *[🔗 Endpoint documentation](https://developers.notion.com/reference/patch-page)*
         """  # noqa: E501
+        body = pick(kwargs, "archived", "properties", "icon", "cover")
+        for nullable_attr in ("icon", "cover"): # make sure those are set to `None`
+            if kwargs.get(nullable_attr, object) is None:
+                body[nullable_attr] = None
+                
         return self.parent.request(
             path=f"pages/{page_id}",
             method="PATCH",
-            body=pick(kwargs, "archived", "properties", "icon", "cover"),
+            body=body,
             auth=kwargs.get("auth"),
         )
 
diff --git a/tests/test_endpoints.py b/tests/test_endpoints.py
index bef0872..369331e 100644
--- a/tests/test_endpoints.py
+++ b/tests/test_endpoints.py
@@ -26,7 +26,11 @@ def test_pages_update(client, page_id):
 
     response = client.pages.update(page_id=page_id, icon=icon)
     assert response["icon"]
-
+    
+    # delete icon again
+    response = client.pages.update(page_id=page_id, icon=None)
+    assert response["icon"] is None
+    
 
 @pytest.mark.vcr()
 def test_pages_properties_retrieve(client, page_id):