diff --git a/2017/solutions/rllchatbot/requirements.txt b/2017/solutions/rllchatbot/requirements.txt
index d3da83a50..56bedf42f 100644
--- a/2017/solutions/rllchatbot/requirements.txt
+++ b/2017/solutions/rllchatbot/requirements.txt
@@ -140,7 +140,7 @@ tornado==4.5.1
 tqdm==4.15.0
 traitlets==4.3.2
 typing==3.6.1
-ujson==1.35
+ujson==5.4.0
 urllib3==1.22
 vaderSentiment==2.5
 wcwidth==0.1.7