diff --git a/packages/langchain/lib/src/embeddings/cache.dart b/packages/langchain/lib/src/embeddings/cache.dart
index 3a67cd39..fe0c9435 100644
--- a/packages/langchain/lib/src/embeddings/cache.dart
+++ b/packages/langchain/lib/src/embeddings/cache.dart
@@ -135,7 +135,7 @@ class EmbeddingsByteStoreEncoder
   @override
   String encodeKey(final String key) {
     final keyHash = sha1.convert(utf8.encode(key)).toString();
-    return uuid.v5(Namespace.URL, keyHash);
+    return uuid.v5(Namespace.url.name, keyHash);
   }
 
   @override