diff --git a/VertebralColumn_KNN/requirements.txt b/VertebralColumn_KNN/requirements.txt
index 2c6a81b..2742c50 100644
--- a/VertebralColumn_KNN/requirements.txt
+++ b/VertebralColumn_KNN/requirements.txt
@@ -44,7 +44,7 @@ mkl-fft==1.0.4
 mkl-random==1.0.1
 more-itertools==7.2.0
 murmurhash==1.0.2
-nbconvert==5.3.1
+nbconvert==6.5.1
 nbformat==4.4.0
 notebook==5.6.0
 numpy==1.15.1