diff --git a/package.json b/package.json
index 8a8c99e4..ea1c31f4 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "phantomjs-prebuilt": "2.1.x"
   },
   "scripts": {
-    "postinstall": "if [ ! -d .tox ] || [ ! -d .tox/karma ]; then tox -ekarma --notest; python3 -m pip install -U -t ./.tox/karma/lib/`python3 -V|tr -d ' '|tr 'P' 'p'|cut -c -9`/site-packages/ ../horizon; fi",
+    "postinstall": "if [ ! -d .tox ] || [ ! -d .tox/karma ]; then tox -ekarma --notest; python3 -m pip install -U -t ./.tox/karma/lib/`python3 -V|tr -d ' '|tr 'P' 'p'|cut -c -9`/site-packages/ -chttps://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt ../horizon; fi",
     "test": "karma start senlin_dashboard/karma.conf.js --single-run",
     "lint": "eslint --no-color senlin_dashboard/static"
   },