diff --git a/requirements.txt b/requirements.txt
index 375abb4..658a655 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ matplotlib==2.2.2
 mistune==0.8.3
 mock==2.0.0
 mpi4py==3.0.0
-nbconvert==5.3.1
+nbconvert==6.5.1
 nbformat==4.4.0
 notebook==5.4.0
 numdifftools==0.9.39