diff --git a/package.json b/package.json
index 061d6004..96bba98b 100644
--- a/package.json
+++ b/package.json
@@ -125,6 +125,7 @@
     "prop-types": "^15.5.10",
     "react": "^15.1.0",
     "react-autosuggest": "^7.0.1",
+    "react-addons-css-transition-group": "~15.4.0",
     "react-datetime": "^2.6.0",
     "react-dom": "^15.1.0",
     "react-frame-component": "^1.0.3",