diff --git a/requirements.txt b/requirements.txt
index 10c4072..2152b35 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,5 +19,5 @@ six==1.11.0
 torch==0.4.1
 torchvision==0.2.1
 tqdm==4.28.1
-ujson==1.35
+ujson==5.2.0
 urllib3==1.24.1