diff --git a/embedchain/embedchain.py b/embedchain/embedchain.py
index 15f0c5b6..5cf833eb 100644
--- a/embedchain/embedchain.py
+++ b/embedchain/embedchain.py
@@ -153,7 +153,7 @@ class EmbedChain:
 
         self.collection.add(
             documents=documents,
-            metadatas=metadatas,
+            metadatas=list(metadatas),
             ids=ids
         )
         print(f"Successfully saved {url}. Total chunks count: {self.collection.count()}")