diff --git a/travis-requirements.txt b/travis-requirements.txt
index 676401c..69bd112 100644
--- a/travis-requirements.txt
+++ b/travis-requirements.txt
@@ -1,4 +1,4 @@
 tox==3.20.1
 codecov==2.1.10
 tox-pyenv==1.1.0
-virtualenv==15.2.0
+virtualenv==20.26.6