diff --git a/supporting/RAGAS_Service/requirements.txt b/supporting/RAGAS_Service/requirements.txt
index be1aa73..48ad957 100644
--- a/supporting/RAGAS_Service/requirements.txt
+++ b/supporting/RAGAS_Service/requirements.txt
@@ -9,6 +9,7 @@ datasets
 # ROBERTA
 scikit-learn
 transformers[torch]
+sentence_transformers
 
 # Utils
 numpy