1.5.4

dist/liquid.js

@@ -80,7 +80,7 @@ var filters = {
         return v.replace(/\n/g, '<br />');
     },
     'plus': bindFixed(function (v, arg) {
-        return v + arg;
+        return Number(v) + Number(arg);
     }),
     'prepend': function prepend(v, arg) {
         return arg + v;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "shopify-liquid",
-  "version": "1.5.3",
+  "version": "1.5.4",
   "description": "A feature-rich Liquid template engine for Node.js and browsers, with compliance with the Ruby version.",
   "main": "index.js",
   "scripts": {