diff --git a/models/User.js b/models/User.js
index cb6c0f2b0..37558d1da 100644
--- a/models/User.js
+++ b/models/User.js
@@ -60,7 +60,7 @@ UserSchema.methods.toProfileJSONFor = function(user){
 
 UserSchema.methods.favorite = function(id){
   if(this.favorites.indexOf(id) === -1){
-    this.favorites.push(id);
+    this.favorites = this.favorites.concat([id]);
   }
 
   return this.save();
@@ -79,7 +79,7 @@ UserSchema.methods.isFavorite = function(id){
 
 UserSchema.methods.follow = function(id){
   if(this.following.indexOf(id) === -1){
-    this.following.push(id);
+    this.following = this.following.concat([id]);
   }
 
   return this.save();
diff --git a/routes/api/articles.js b/routes/api/articles.js
index e0f1074ba..c17ca6145 100644
--- a/routes/api/articles.js
+++ b/routes/api/articles.js
@@ -254,7 +254,7 @@ router.post('/:article/comments', auth.required, function(req, res, next) {
     comment.author = user;
 
     return comment.save().then(function(){
-      req.article.comments.push(comment);
+      req.article.comments = req.article.comments.concat([comment]);
 
       return req.article.save().then(function(article) {
         res.json({comment: comment.toJSONFor(user)});