diff --git a/pretraining/requirements.txt b/pretraining/requirements.txt
index a7d9ca3..f373bb1 100644
--- a/pretraining/requirements.txt
+++ b/pretraining/requirements.txt
@@ -71,7 +71,7 @@ matplotlib==3.2.0
 mesh-tensorflow==0.1.13
 mistune==0.8.4
 mpmath==1.1.0
-nbconvert==5.6.1
+nbconvert==6.3.0
 nbformat==5.0.4
 nltk==3.6.6
 notebook==6.4.1