diff --git a/python/dify_plugin/interfaces/model/openai_compatible/llm.py b/python/dify_plugin/interfaces/model/openai_compatible/llm.py
index 47861d2a..ed2201a4 100644
--- a/python/dify_plugin/interfaces/model/openai_compatible/llm.py
+++ b/python/dify_plugin/interfaces/model/openai_compatible/llm.py
@@ -173,6 +173,12 @@ def validate_credentials(self, model: str, credentials: dict) -> None:
         """
         try:
             headers = {"Content-Type": "application/json"}
+            extra_headers = credentials.get("extra_headers")
+            if extra_headers is not None:
+                headers = {
+                    **headers,
+                    **extra_headers,
+                }
 
             api_key = credentials.get("api_key")
             if api_key: