diff --git a/semantic_router/index/qdrant.py b/semantic_router/index/qdrant.py
index 12337eda0085b7557dcdcc931e7051a1d4383063..1b23753ba886db48947a14108d1fe7a0ced56c42 100644
--- a/semantic_router/index/qdrant.py
+++ b/semantic_router/index/qdrant.py
@@ -40,7 +40,7 @@ class QdrantIndex(BaseIndex):
         default=6334,
         description="Port of the gRPC interface.",
     )
-    prefer_grpc: bool = Field(
+    prefer_grpc: Optional[bool] = Field(
         default=None,
         description="Whether to use gPRC interface whenever possible in methods",
     )