diff --git a/appengine/uploader/requirements.txt b/appengine/uploader/requirements.txt
index 701f752..74867ad 100644
--- a/appengine/uploader/requirements.txt
+++ b/appengine/uploader/requirements.txt
@@ -45,7 +45,7 @@ rsa==4.0
 six==1.12.0
 soupsieve==1.7.3
 uritemplate==3.0.0
-urllib3==1.24.1
+urllib3==1.26.17
 waitress==1.2.1
 WebOb==1.8.5
 Werkzeug==0.15.3