diff --git a/.github/workflows/constraints.txt b/.github/workflows/constraints.txt
index dd24191..e90f881 100644
--- a/.github/workflows/constraints.txt
+++ b/.github/workflows/constraints.txt
@@ -2,6 +2,6 @@ pip==26.1.2
 nox==2026.7.11
 nox-poetry==1.2.0
 poetry==2.4.1
-virtualenv==20.37.0
+virtualenv==21.7.0
 poetry-dynamic-versioning==1.10.0
 toml==0.10.2