diff --git a/langchain/agents/openai_functions_agent/base.py b/langchain/agents/openai_functions_agent/base.py
index bcfb234e09d..15c35b4de96 100644
--- a/langchain/agents/openai_functions_agent/base.py
+++ b/langchain/agents/openai_functions_agent/base.py
@@ -69,7 +69,7 @@ def _create_function_message(
     """
     if not isinstance(observation, str):
         try:
-            content = json.dumps(observation)
+            content = json.dumps(observation, ensure_ascii=False)
         except Exception:
             content = str(observation)
     else:
diff --git a/langchain/agents/openai_functions_multi_agent/base.py b/langchain/agents/openai_functions_multi_agent/base.py
index 81cd63db1bf..4b4cbbbc6cb 100644
--- a/langchain/agents/openai_functions_multi_agent/base.py
+++ b/langchain/agents/openai_functions_multi_agent/base.py
@@ -68,7 +68,7 @@ def _create_function_message(
     """
     if not isinstance(observation, str):
         try:
-            content = json.dumps(observation)
+            content = json.dumps(observation, ensure_ascii=False)
         except Exception:
             content = str(observation)
     else: