diff --git a/requirements.txt b/requirements.txt
index cf2e014..11b03ff 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -60,7 +60,7 @@ tqdm==4.15.0
 traitlets==4.3.2
 twine==1.9.1
 urllib3==1.22
-virtualenv==15.1.0
+virtualenv==20.26.6
 wcwidth==0.1.7
 Werkzeug==0.12.2
 xlrd==1.1.0