diff --git a/libs/langgraph/langgraph/graph/state.py b/libs/langgraph/langgraph/graph/state.py
index df38e07e2..f952282eb 100644
--- a/libs/langgraph/langgraph/graph/state.py
+++ b/libs/langgraph/langgraph/graph/state.py
@@ -171,7 +171,7 @@ class StateGraph(Graph):
                 schema_name = getattr(schema, "__name__", "")
                 raise ValueError(
                     f"Invalid managed channels detected in {schema_name}: {names}."
-                    " Managed channels are not permited in Input/Output schema."
+                    " Managed channels are not permitted in Input/Output schema."
                 )
             self.schemas[schema] = {**channels, **managed}
             for key, channel in channels.items():
diff --git a/libs/langgraph/tests/test_state.py b/libs/langgraph/tests/test_state.py
index 670a2c2e8..cb5720781 100644
--- a/libs/langgraph/tests/test_state.py
+++ b/libs/langgraph/tests/test_state.py
@@ -220,7 +220,7 @@ def test_raises_invalid_managed():
     for _state, _inp, _outp in bad_input_examples:
         with pytest.raises(
             ValueError,
-            match="Invalid managed channels detected in BadInputState: some_input_channel. Managed channels are not permited in Input/Output schema.",
+            match="Invalid managed channels detected in BadInputState: some_input_channel. Managed channels are not permitted in Input/Output schema.",
         ):
             StateGraph(_state, input=_inp, output=_outp)
     bad_output_examples = [
@@ -232,6 +232,6 @@ def test_raises_invalid_managed():
     for _state, _inp, _outp in bad_output_examples:
         with pytest.raises(
             ValueError,
-            match="Invalid managed channels detected in BadOutputState: some_output_channel. Managed channels are not permited in Input/Output schema.",
+            match="Invalid managed channels detected in BadOutputState: some_output_channel. Managed channels are not permitted in Input/Output schema.",
         ):
             StateGraph(_state, input=_inp, output=_outp)