diff --git a/g-cloud/requirements.txt b/g-cloud/requirements.txt
index 54cb0b2..c7d8d6f 100644
--- a/g-cloud/requirements.txt
+++ b/g-cloud/requirements.txt
@@ -143,7 +143,7 @@ msgpack==0.6.1
 multipledispatch==0.6.0
 multitasking==0.0.9
 navigator-updater==0.2.1
-nbconvert==5.6.1
+nbconvert==6.5.1
 nbformat==5.0.4
 networkx==2.4
 nltk==3.4.5