diff --git a/.github/workflows/constraints.txt b/.github/workflows/constraints.txt
index 8868004..7a29f88 100644
--- a/.github/workflows/constraints.txt
+++ b/.github/workflows/constraints.txt
@@ -1,4 +1,4 @@
 pip==20.2.3
 nox==2020.8.22
 poetry==1.1.3
-virtualenv==20.0.34
+virtualenv==20.0.35