diff --git a/semantic_router/index/pinecone.py b/semantic_router/index/pinecone.py
index 469a41411f8f1779f5ecfb9fc1dbd727d349085e..60ada2e3767b92750706c1ab191674b79f2c39db 100644
--- a/semantic_router/index/pinecone.py
+++ b/semantic_router/index/pinecone.py
@@ -653,6 +653,9 @@ class PineconeIndex(BaseIndex):
             "ids": [vector_id],
         }
 
+        if self.namespace:
+            params["namespace"] = [self.namespace]
+
         headers = {
             "Api-Key": self.api_key,
         }