diff --git a/app.js b/app.js
index a178498a..ecb8c8ae 100755
--- a/app.js
+++ b/app.js
@@ -210,10 +210,12 @@ findCompilers().then(function (compilers) {
         sFavicon = require('serve-favicon'),
         sStatic = require('serve-static'),
         bodyParser = require('body-parser'),
-        logger = require('morgan');
+        logger = require('morgan'),
+        compression = require('compression');
 
     webServer
         .use(logger('combined'))
+        .use(compression())
         .use(sFavicon('static/favicon.ico'))
         .use(sStatic('static', {maxAge: staticMaxAgeMs}))
         .use(bodyParser.urlencoded({extended: true}))
diff --git a/lib/compile.js b/lib/compile.js
index 3558e13c..d811a6ff 100644
--- a/lib/compile.js
+++ b/lib/compile.js
@@ -230,6 +230,7 @@ function compileHandler(compilers) {
         var filters = req.body.filters;
         compileObj.compile(source, compiler, options, filters).then(
             function (result) {
+                res.set('Content-Type', 'application/json');
                 res.end(JSON.stringify(result));
             },
             function (error) {
diff --git a/package.json b/package.json
index ae6672cc..8f15e1ef 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
   "main": "./app.js",
   "dependencies": {
     "body-parser": "1.10.x",
+    "compression": "1.3.x",
     "express": "4.11.x",
     "fs-extra": "0.8.x",
     "lru-cache": "2.5.x",