diff --git a/requirements.txt b/requirements.txt
index 3f4ee1b..065d509 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ lmfit==0.9.12
 MarkupSafe==1.1.1
 matplotlib==3.0.3
 mistune==0.8.4
-nbconvert==5.4.1
+nbconvert==6.3.0
 nbformat==4.4.0
 notebook==5.7.6
 numpy==1.16.2