diff --git a/requirements-test.txt b/requirements-test.txt
index c3aa391d..91acbd0a 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -35,5 +35,5 @@ scandir==1.10.0
 toml==0.10.0
 typing==3.7.4.1
 u-msgpack-python==2.5.2
-virtualenv==20.0.6
+virtualenv==20.0.21
 zipp==1.2.0