diff --git a/lower-constraints.txt b/lower-constraints.txt
index ab23ca771b..32fb063749 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -72,7 +72,6 @@ requestsexceptions==1.4.0
 restructuredtext-lint==1.1.3
 rfc3986==1.2.0
 simplejson==3.13.2
-six==1.10.0
 smmap2==2.0.3
 snowballstemmer==1.2.1
 sphinxcontrib-svg2pdfconverter==0.1.0