diff --git a/src/posts/edit.js b/src/posts/edit.js
index 333901c1fa..5bb76ec019 100644
--- a/src/posts/edit.js
+++ b/src/posts/edit.js
@@ -68,8 +68,8 @@ module.exports = function(Posts) {
 
 				plugins.fireHook('action:post.edit', _.clone(postData));
 
-				cache.del(postData.pid);
-				pubsub.publish('post:edit', postData.pid);
+				cache.del(String(postData.pid));
+				pubsub.publish('post:edit', String(postData.pid));
 
 				Posts.parsePost(postData, next);
 			},
diff --git a/src/posts/parse.js b/src/posts/parse.js
index 19e6430681..88fa5f8c22 100644
--- a/src/posts/parse.js
+++ b/src/posts/parse.js
@@ -15,8 +15,8 @@ module.exports = function(Posts) {
 	Posts.parsePost = function(postData, callback) {
 		postData.content = postData.content || '';
 
-		if (postData.pid && cache.has(postData.pid)) {
-			postData.content = cache.get(postData.pid);
+		if (postData.pid && cache.has(String(postData.pid))) {
+			postData.content = cache.get(String(postData.pid));
 			return callback(null, postData);
 		}
 
@@ -33,7 +33,7 @@ module.exports = function(Posts) {
 			data.postData.content = translator.escape(data.postData.content);
 
 			if (global.env === 'production' && data.postData.pid) {
-				cache.set(data.postData.pid, data.postData.content);
+				cache.set(String(data.postData.pid), data.postData.content);
 			}
 
 			callback(null, data.postData);