diff --git a/requirements.txt b/requirements.txt
index 0474f38..a31ee39 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,5 +34,5 @@ tox==3.24.5
 tqdm==4.63.0
 twine==3.8.0
 urllib3==1.26.9
-virtualenv==20.13.3
+virtualenv==20.13.4
 webencodings==0.5.1