diff --git a/semantic_router/index/pinecone.py b/semantic_router/index/pinecone.py
index 469a4141..60ada2e3 100644
--- a/semantic_router/index/pinecone.py
+++ b/semantic_router/index/pinecone.py
@@ -653,6 +653,9 @@ async def _async_fetch_metadata(self, vector_id: str) -> dict:
             "ids": [vector_id],
         }
 
+        if self.namespace:
+            params["namespace"] = [self.namespace]
+
         headers = {
             "Api-Key": self.api_key,
         }