diff --git a/CogQA-ref/requirements.txt b/CogQA-ref/requirements.txt
index 51563f7..72ba3da 100644
--- a/CogQA-ref/requirements.txt
+++ b/CogQA-ref/requirements.txt
@@ -6,4 +6,4 @@ redis==3.2.1
 torch==1.0.1.post2
 torchvision==0.2.2.post3
 tqdm==4.31.1
-ujson==1.35
\ No newline at end of file
+ujson==5.4.0
\ No newline at end of file