diff --git a/container-optimizer/requirements.txt b/container-optimizer/requirements.txt
index 61c96cf..e893f85 100644
--- a/container-optimizer/requirements.txt
+++ b/container-optimizer/requirements.txt
@@ -56,7 +56,7 @@ matplotlib==3.1.3
 mistune==0.8.4
 mock==4.0.2
 mpmath==1.1.0
-nbconvert==5.6.1
+nbconvert==6.5.1
 nbformat==5.0.4
 networkx==2.4
 notebook==6.0.3