diff --git a/.github/workflows/constraints.txt b/.github/workflows/constraints.txt
index 80c9f8d..47e202b 100644
--- a/.github/workflows/constraints.txt
+++ b/.github/workflows/constraints.txt
@@ -1,4 +1,4 @@
 pip==20.1.1
 nox==2020.5.24
 poetry==1.0.9
-virtualenv==20.0.26
+virtualenv==20.4.3