diff --git a/.github/workflows/constraints.txt b/.github/workflows/constraints.txt
index dbd6c9f..eec372f 100644
--- a/.github/workflows/constraints.txt
+++ b/.github/workflows/constraints.txt
@@ -2,4 +2,4 @@ pip==21.0
 nox==2020.12.31
 nox-poetry==0.7.1
 poetry==1.1.4
-virtualenv==20.4.0
+virtualenv==20.20.0