diff --git a/composer.json b/composer.json
index 3bf44308..baf9c901 100644
--- a/composer.json
+++ b/composer.json
@@ -7,8 +7,8 @@
     "calendar",
     "date"
   ],
-  "require": {
-      "webmodules/moment" : ">=2.10.4"
+  "suggest": {
+      "moment/moment": "Allows custom formatting of Pikaday dates"
   },
   "main": [
     "./pikaday.js",