diff --git a/backend/requirements.txt b/backend/requirements.txt
index 217a711ab..46b9bc28d 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -40,9 +40,10 @@ langchain-community==0.2.12
 langchain-chroma==0.1.4
 
 fake-useragent==1.5.1
-chromadb==0.5.15
-pymilvus==2.4.7
+chromadb==0.5.5
+pymilvus==2.4.6
 qdrant-client~=1.12.0
+opensearch-py==2.7.1
 
 sentence-transformers==3.2.0
 colbert-ai==0.2.21