diff --git a/requirements.txt b/requirements.txt
index 547ffc3..beb874b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,5 +27,5 @@ sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
 urllib3==1.26.4
-virtualenv==20.9.0
+virtualenv==20.19.0
 virtualenv-clone==0.5.7