diff --git a/backend/api/types/open.py b/backend/api/types/open.py
index f9ca745a..9e7e865c 100644
--- a/backend/api/types/open.py
+++ b/backend/api/types/open.py
@@ -99,7 +99,7 @@ class IEnhancement(BaseModel):
 class SkillDetail(BaseModel):
     name: str = Field(..., description='技能名称')
     """技能名称"""
-    type: SkillType = Field(..., description='技能类型')
+    type: SkillType | None = Field(..., description='技能类型')
     """技能类型"""
     desc: str | None = Field(None, description='技能描述')
     """技能描述"""