diff --git a/backend/requirements.txt b/backend/requirements.txt
index 5ba6a84d4..f3f84b4b6 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -49,7 +49,7 @@ pymilvus==2.5.0
 qdrant-client~=1.12.0
 opensearch-py==2.8.0
 playwright==1.49.1 # Caution: version must match docker-compose.playwright.yaml
-elasticsearch==8.17.1
+elasticsearch==9.0.1
 pinecone==6.0.2
 
 transformers