diff --git a/requirements.txt b/requirements.txt
index f2f291ac605b441a8cda2e2b03ed28dc1486c68e..9916ed682ab69d6224f4d8d4f5f0dbd54bebcf2d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,8 @@ python-multipart==0.0.5
 pytz==2019.3
 requests==2.23.0
 Shapely==1.7.0
-six==1.14.0
+# do not install this for CI (it is already in the runner)
+# six==1.14.0
 sqlacodegen==2.1.0
 SQLAlchemy==1.3.16
 SQLAlchemy-Utils==0.36.5