diff --git a/lib/sycamore/sycamore/llms/anthropic.py b/lib/sycamore/sycamore/llms/anthropic.py
index 217396b26..ee48b3e50 100644
--- a/lib/sycamore/sycamore/llms/anthropic.py
+++ b/lib/sycamore/sycamore/llms/anthropic.py
@@ -235,7 +235,7 @@ def generate_batch(self, *, prompts: list[RenderedPrompt], llm_kwargs: Optional[
             kwargs = get_generate_kwargs(p, llm_kwargs)
             kwargs["model"] = self.model.value
             kwargs["max_tokens"] = kwargs.get("max_tokens", 1024)
-            mparams = MessageCreateParamsNonStreaming(**kwargs)
+            mparams = MessageCreateParamsNonStreaming(**kwargs)  # type: ignore
             rq = Request(custom_id=str(i), params=mparams)
             calls.append(rq)