diff --git a/2017/solutions/rllchatbot/requirements.txt b/2017/solutions/rllchatbot/requirements.txt
index d3da83a50..372c89d2f 100644
--- a/2017/solutions/rllchatbot/requirements.txt
+++ b/2017/solutions/rllchatbot/requirements.txt
@@ -65,7 +65,7 @@ mccabe==0.6.1
 mistune==0.7.4
 mock==2.0.0
 murmurhash==0.26.4
-nbconvert==5.2.1
+nbconvert==6.5.1
 nbformat==4.3.0
 ndg-httpsclient==0.4.2
 nltk==3.2.5