diff --git a/manim/utils/hashing.py b/manim/utils/hashing.py
index ee79effef3..471b01893a 100644
--- a/manim/utils/hashing.py
+++ b/manim/utils/hashing.py
@@ -111,6 +111,11 @@ def _iter_check_list(lst):
             # We have to make a copy, as we don't want to touch to the original list
             # A deepcopy isn't necessary as it is already recursive.
             lst_copy = copy.copy(lst)
+            if isinstance(lst, tuple):
+                # NOTE: Sometimes a tuple can pass through this function. As a tuple
+                # is immutable, we convert it to a list to be able to modify it.
+                # It's ok as it is a copy.
+                lst_copy = list(lst_copy)
             for i, el in enumerate(lst):
                 if not isinstance(lst, tuple):
                     lst_copy[i] = self._handle_already_processed(
diff --git a/tests/test_hashing.py b/tests/test_hashing.py
index aa295415ee..2a839dd20c 100644
--- a/tests/test_hashing.py
+++ b/tests/test_hashing.py
@@ -108,3 +108,9 @@ def test_JSON_with_big_np_array():
     a = np.zeros((1000, 1000))
     o_ser = hashing.get_json(a)
     assert "TRUNCATED ARRAY" in o_ser
+
+
+def test_JSON_with_tuple():
+    o = [(1, [1])]
+    o_ser = hashing.get_json(o)
+    assert o_ser == "[[1, [1]]]"