diff --git a/litellm/types/llms/anthropic.py b/litellm/types/llms/anthropic.py
index 076d8e414a3..837f4bf9a8f 100644
--- a/litellm/types/llms/anthropic.py
+++ b/litellm/types/llms/anthropic.py
@@ -16,6 +16,7 @@ class AnthropicInputSchema(TypedDict, total=False):
     type: Optional[str]
     properties: Optional[dict]
     additionalProperties: Optional[bool]
+    required: Optional[List[str]]
 
 
 class AnthropicMessagesTool(TypedDict, total=False):