diff --git a/examples/clustering_users/clustering_requirements.txt b/examples/clustering_users/clustering_requirements.txt
index fc4304d..f5f813e 100644
--- a/examples/clustering_users/clustering_requirements.txt
+++ b/examples/clustering_users/clustering_requirements.txt
@@ -28,7 +28,7 @@ MarkupSafe==1.0
 matplotlib==2.1.0
 mistune==0.8
 -e git+git://github.com/DmitryUlyanov/Multicore-TSNE#egg=Multicore-TSNE
-nbconvert==5.3.1
+nbconvert==6.3.0
 nbformat==4.4.0
 nltk==3.2.5
 notebook==5.2.0