diff --git a/requirements.txt b/requirements.txt
index 4b9147d..ca9df6a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -76,7 +76,7 @@ mpmath==0.19
 msgpack-python==0.4.8
 multipledispatch==0.4.9
 navigator-updater==0.1.0
-nbconvert==5.1.1
+nbconvert==6.5.1
 nbformat==4.3.0
 networkx==1.11
 nltk==3.2.3