diff --git a/backend/open_webui/models/prompts.py b/backend/open_webui/models/prompts.py
index 5d07d65833..ed6bc35950 100644
--- a/backend/open_webui/models/prompts.py
+++ b/backend/open_webui/models/prompts.py
@@ -87,7 +87,7 @@ class PromptForm(BaseModel):
     data: dict | None = None
     meta: dict | None = None
     tags: list[str | None] = None
-    access_grants: list[dict | None] = None
+    access_grants: list[dict] | None = None
     version_id: str | None = None  # Active version
     commit_message: str | None = None  # For history tracking
     is_production: bool | None = True  # Whether to set new version as production
@@ -100,7 +100,7 @@ class PromptsTable:
     async def _to_prompt_model(
         self,
         prompt: Prompt,
-        access_grants: list[AccessGrantModel | None] = None,
+        access_grants: list[AccessGrantModel] | None = None,
         db: AsyncSession | None = None,
     ) -> PromptModel:
         prompt_model = PromptModel.model_validate(prompt)
diff --git a/backend/open_webui/models/tools.py b/backend/open_webui/models/tools.py
index 24e019aea9..ddb4d78581 100644
--- a/backend/open_webui/models/tools.py
+++ b/backend/open_webui/models/tools.py
@@ -89,7 +89,7 @@ class ToolForm(BaseModel):
     name: str
     content: str
     meta: ToolMeta
-    access_grants: list[dict | None] = None
+    access_grants: list[dict] | None = None
 
 
 class ToolValves(BaseModel):
@@ -103,7 +103,7 @@ class ToolsTable:
     async def _to_tool_model(
         self,
         tool: Tool,
-        access_grants: list[AccessGrantModel | None] = None,
+        access_grants: list[AccessGrantModel] | None = None,
         db: AsyncSession | None = None,
     ) -> ToolModel:
         tool_model = ToolModel.model_validate(tool)