diff --git a/requirements.txt b/requirements.txt
index 127d1a3..1550941 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ python-dateutil==2.8.1
 repoze.lru==0.7
 requests==2.21.0
 simplejson==3.16.0
-six==1.14.0
+six==1.15.0
 transaction==3.0.0
 translationstring==1.3
 ujson==2.0.3