diff --git a/litellm/types/llms/anthropic.py b/litellm/types/llms/anthropic.py
index cc6eccbf3e0..4ce04dd0d69 100644
--- a/litellm/types/llms/anthropic.py
+++ b/litellm/types/llms/anthropic.py
@@ -36,6 +36,7 @@ AnthropicInputSchema = TypedDict(
 class AnthropicOutputSchema(TypedDict, total=False):
     type: Required[Literal["json_schema"]]
     schema: Required[dict]
+    strict: ReadOnly[bool]
 
 
 class AnthropicOutputConfig(TypedDict, total=False):