diff --git a/cover/requirements.txt b/cover/requirements.txt
index 1a01ec3..ca3d62c 100644
--- a/cover/requirements.txt
+++ b/cover/requirements.txt
@@ -43,7 +43,7 @@ kiwisolver==1.0.1
 MarkupSafe==1.0
 matplotlib==3.0.0
 mistune==0.8.4
-nbconvert==5.4.0
+nbconvert==6.3.0
 nbformat==4.4.0
 nose==1.3.7
 notebook==5.7.0