diff --git a/package.json b/package.json
index 67dda4a852..31a9bae917 100644
--- a/package.json
+++ b/package.json
@@ -61,6 +61,7 @@
     "ember-cli-template-lint": "0.4.12",
     "ember-cli-test-loader": "^1.1.0",
     "ember-cli-uglify": "^1.2.0",
+    "ember-concurrency": "0.7.19",
     "ember-data": "^2.10.0",
     "ember-export-application-global": "^1.0.5",
     "ember-fullcalendar": "1.3.0",