diff --git a/python_requirements.txt b/python_requirements.txt
index a668bd1..9265bd5 100644
--- a/python_requirements.txt
+++ b/python_requirements.txt
@@ -103,7 +103,7 @@ nbformat==4.4.0
 networkx==2.2
 nltk==3.4.5
 nose==1.3.7
-notebook==6.1.5
+notebook==6.4.1
 numexpr==2.6.8
 numpy==1.15.4
 numpydoc==0.8.0