diff --git a/VertebralColumn_KNN/requirements.txt b/VertebralColumn_KNN/requirements.txt
index 2c6a81b..f565150 100644
--- a/VertebralColumn_KNN/requirements.txt
+++ b/VertebralColumn_KNN/requirements.txt
@@ -13,7 +13,7 @@ cffi==1.11.5
 chardet==3.0.4
 conda==4.5.11
 constantly==15.1.0
-cryptography==2.3.1
+cryptography==3.2
 cycler==0.10.0
 cymem==2.0.3
 decorator==4.3.0