diff --git a/CogQA-ref/requirements.txt b/CogQA-ref/requirements.txt
index 51563f7..d8df6c0 100644
--- a/CogQA-ref/requirements.txt
+++ b/CogQA-ref/requirements.txt
@@ -2,7 +2,7 @@ fire==0.1.3
 fuzzywuzzy==0.17.0
 python-Levenshtein==0.12.0
 pytorch-pretrained-bert==0.6.2
-redis==3.2.1
+redis==4.5.3
 torch==1.0.1.post2
 torchvision==0.2.2.post3
 tqdm==4.31.1