diff --git a/astrbot/core/provider/sources/openrouter_source.py b/astrbot/core/provider/sources/openrouter_source.py
index 7727b24fe..2cb446cf3 100644
--- a/astrbot/core/provider/sources/openrouter_source.py
+++ b/astrbot/core/provider/sources/openrouter_source.py
@@ -2,7 +2,9 @@ from ..register import register_provider_adapter
 from .openai_source import ProviderOpenAIOfficial
 
 
-@register_provider_adapter("openrouter_chat_completion", "OpenRouter Chat Completion Provider Adapter")
+@register_provider_adapter(
+    "openrouter_chat_completion", "OpenRouter Chat Completion Provider Adapter"
+)
 class ProviderOpenRouter(ProviderOpenAIOfficial):
     def __init__(
         self,