diff --git a/requirements.txt b/requirements.txt
index 210e2f2..1649f0a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -106,7 +106,7 @@ mpmath==1.1.0
 msgpack==1.0.0
 multipledispatch==0.6.0
 multitasking==0.0.9
-nbconvert==5.6.1
+nbconvert==6.5.1
 nbformat==5.0.7
 networkx 
 nose==1.3.7