diff --git a/.appveyor_support/environments/requirements_py36.txt b/.appveyor_support/environments/requirements_py36.txt
index 4953d79..e39d40b 100644
--- a/.appveyor_support/environments/requirements_py36.txt
+++ b/.appveyor_support/environments/requirements_py36.txt
@@ -40,7 +40,7 @@ matplotlib==3.1.0
 mccabe==0.6.1
 mistune==0.8.4
 more-itertools==7.0.0
-nbconvert==5.5.0
+nbconvert==6.3.0
 nbformat==4.4.0
 networkx==2.3
 nose==1.3.7