diff --git a/dash/_patch.py b/dash/_patch.py
index 35af8e0730..fe5f618170 100644
--- a/dash/_patch.py
+++ b/dash/_patch.py
@@ -99,6 +99,9 @@ def __ior__(self, other):
         self.update(E=other)
         return _noop
 
+    def __iter__(self):
+        raise TypeError("Iterating over patch objects is prohibited.")
+
     def append(self, item):
         """Add the item to the end of a list"""
         self._operations.append(_operation("Append", self._location, value=item))
diff --git a/tests/unit/test_patch.py b/tests/unit/test_patch.py
index 03b7cc1843..c3298f64bf 100644
--- a/tests/unit/test_patch.py
+++ b/tests/unit/test_patch.py
@@ -255,3 +255,11 @@ def test_pat020_patch_pickle():
     q = pickle.loads(data)
 
     assert patch_to_dict(p) == patch_to_dict(q)
+
+
+def test_pat021_patch_iter():
+    p = Patch()
+
+    with pytest.raises(TypeError):
+        for _ in p["invalid"]:
+            print("invalid iteration")