diff --git a/example/requirements.txt b/example/requirements.txt
index 5fbddeb..51accc4 100644
--- a/example/requirements.txt
+++ b/example/requirements.txt
@@ -1,3 +1,3 @@
 glob2==0.4.1
 hellbox==0.1.3
-virtualenv==21.7.4
+virtualenv==21.7.13