diff --git a/algorithms_training/requirements.txt b/algorithms_training/requirements.txt
index c629d8c..e7a9b34 100644
--- a/algorithms_training/requirements.txt
+++ b/algorithms_training/requirements.txt
@@ -22,7 +22,7 @@ matplotlib==3.0.2
 mistune==0.8.4
 nbconvert==5.4.0
 nbformat==4.4.0
-notebook==5.7.4
+notebook==6.4.12
 numpy==1.16.1
 pandas==0.24.0
 pandocfilters==1.4.2