diff --git a/VertebralColumn_KNN/requirements.txt b/VertebralColumn_KNN/requirements.txt
index 2c6a81b..004d648 100644
--- a/VertebralColumn_KNN/requirements.txt
+++ b/VertebralColumn_KNN/requirements.txt
@@ -46,7 +46,7 @@ more-itertools==7.2.0
 murmurhash==1.0.2
 nbconvert==5.3.1
 nbformat==4.4.0
-notebook==5.6.0
+notebook==6.4.10
 numpy==1.15.1
 pandas==0.23.4
 pandocfilters==1.4.2