diff --git a/requirements.txt b/requirements.txt
index 188679a..759bcab 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@ jupyter==1.0.0
 notebook==6.4.1       
 numpy==1.16.4     
 python==3.7.0      
-virtualenv==16.0.0    
+virtualenv==20.26.6