diff --git a/.github/workflows/constraints.txt b/.github/workflows/constraints.txt
index a6df5d4..b9868aa 100644
--- a/.github/workflows/constraints.txt
+++ b/.github/workflows/constraints.txt
@@ -2,4 +2,4 @@ pip==21.0.1
 nox==2020.12.31
 nox-poetry==0.8.4
 poetry==1.1.5
-virtualenv==20.4.2
+virtualenv==20.4.3