diff --git a/requirements.txt b/requirements.txt
index c5ac5ae..65cee46 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ matplotlib==2.2.2
 mccabe==0.6.1
 mistune==0.8.3
 more-itertools==4.3.0
-nbconvert==5.3.1
+nbconvert==6.5.1
 nbformat==4.4.0
 nbval==0.9.1
 netCDF4==1.4.0