diff --git a/requirements_frozen.txt b/requirements_frozen.txt
index e0756e6..d659848 100644
--- a/requirements_frozen.txt
+++ b/requirements_frozen.txt
@@ -21,7 +21,7 @@ jupyter-core==4.2.1
 matplotlib==1.5.3
 mistune==0.8.1
 multipledispatch==0.4.9
-nbconvert==4.2.0
+nbconvert==6.5.1
 nbformat==4.2.0
 networkx==1.11
 notebook==5.7.8