diff --git a/dist/liquid.js b/dist/liquid.js
index 9f23c2077..2279b68ce 100644
--- a/dist/liquid.js
+++ b/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;
diff --git a/dist/liquid.min.js b/dist/liquid.min.js
index c36813081..c54bb8dea 100644
--- a/dist/liquid.min.js
+++ b/dist/liquid.min.js
@@ -1,2 +1,2 @@
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\ No newline at end of file
diff --git a/package.json b/package.json
index 1a86db50d..cbf15d6e3 100644
--- a/package.json
+++ b/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": {