diff --git a/requirements.txt b/requirements.txt
index d19fb81..5e3d085 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -58,7 +58,7 @@ matplotlib==2.0.0
 mistune>=0.8.1
 mpmath==0.19
 multipledispatch==0.4.9
-nbconvert==4.2.0
+nbconvert==6.3.0
 nbformat==4.2.0
 networkx==1.11
 nltk==3.4.5