diff --git a/package.json b/package.json
index 766a927..ceac900 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "d3-time-format": "^0.3.2",
     "es6-error": "^4.0.2",
     "lodash": "^4.13.1",
-    "moment": "^2.13.0",
+    "moment": "~2.18.0",
     "regenerator-runtime": "^0.11.0",
     "stream-to-async-iterator": "^0.2.0",
     "tv4": "^1.2.7"