diff --git a/exercises/components/exercise.js b/exercises/components/exercise.js
index 5b819d1..e1aa9f5 100644
--- a/exercises/components/exercise.js
+++ b/exercises/components/exercise.js
@@ -69,7 +69,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this;
diff --git a/exercises/css/exercise.js b/exercises/css/exercise.js
index 5b819d1..e1aa9f5 100644
--- a/exercises/css/exercise.js
+++ b/exercises/css/exercise.js
@@ -69,7 +69,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this;
diff --git a/exercises/css/solution/solution.js b/exercises/css/solution/solution.js
index 6ed84db..f8cd9e7 100644
--- a/exercises/css/solution/solution.js
+++ b/exercises/css/solution/solution.js
@@ -4,14 +4,15 @@ var app = express();
 app.set('port', (process.argv[2] || 3000));
 app.set('view engine', 'jsx');
 app.set('views', __dirname + '/views');
-app.engine('jsx', require('express-react-views').createEngine({ transformViews: false }));
+app.engine('jsx', require('express-react-views').createEngine({transformViews: false}));
 
 require('babel/register')({
-	ignore: false
+    ignore: false
 });
 
-app.use('/', function(req, res) {
-	res.render('index', '');
+app.use('/', function (req, res) {
+    res.render('index', '');
 });
 
-app.listen(app.get('port'), function() {});
+app.listen(app.get('port'), function () {
+});
diff --git a/exercises/css2/exercise.js b/exercises/css2/exercise.js
index 1eea3a2..23636e0 100644
--- a/exercises/css2/exercise.js
+++ b/exercises/css2/exercise.js
@@ -82,7 +82,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this
diff --git a/exercises/css2/solution/solution.js b/exercises/css2/solution/solution.js
index 37acdbf..eb9e9fb 100644
--- a/exercises/css2/solution/solution.js
+++ b/exercises/css2/solution/solution.js
@@ -19,6 +19,7 @@ app.engine('jsx', require('express-react-views').createEngine());
 require('babel/register')({
     ignore: false
 });
+
 var TodoBox = require('./views/index.jsx');
 
 var data = [
diff --git a/exercises/event/exercise.js b/exercises/event/exercise.js
index 55eb352..d61164d 100644
--- a/exercises/event/exercise.js
+++ b/exercises/event/exercise.js
@@ -82,7 +82,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this
diff --git a/exercises/hello_react/exercise.js b/exercises/hello_react/exercise.js
index df60d7c..af14474 100644
--- a/exercises/hello_react/exercise.js
+++ b/exercises/hello_react/exercise.js
@@ -69,7 +69,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this;
diff --git a/exercises/hello_react/problem.md b/exercises/hello_react/problem.md
index fb371f1..866b6a1 100644
--- a/exercises/hello_react/problem.md
+++ b/exercises/hello_react/problem.md
@@ -10,8 +10,6 @@
 
 `$ npm install react react-dom express body-parser express-react-views@0.9.0 babel@5.8.23`
 
-`@5.8.23`
-
 `node_modules` というフォルダが作成されたかと思います。その中にモジュールのフォルダがあります。
 
 次に `program.js` を作成します。
diff --git a/exercises/isomorphic/exercise.js b/exercises/isomorphic/exercise.js
index 1eea3a2..23636e0 100644
--- a/exercises/isomorphic/exercise.js
+++ b/exercises/isomorphic/exercise.js
@@ -82,7 +82,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this
diff --git a/exercises/isomorphic/solution/solution.js b/exercises/isomorphic/solution/solution.js
index 45ef19e..f81f85a 100644
--- a/exercises/isomorphic/solution/solution.js
+++ b/exercises/isomorphic/solution/solution.js
@@ -30,11 +30,11 @@ var data = [
 app.use('/bundle.js', function (req, res) {
     res.setHeader('content-type', 'application/javascript');
 
-    browserify({ debug: true })
+    browserify({debug: true})
         .transform(babelify.configure({
             presets: ["react", "es2015"]
         }))
-        .require("./app.js", { entry: true })
+        .require("./app.js", {entry: true})
         .bundle()
         .pipe(res);
 });
diff --git a/exercises/prop_and_state/exercise.js b/exercises/prop_and_state/exercise.js
index f87264c..9a4c247 100644
--- a/exercises/prop_and_state/exercise.js
+++ b/exercises/prop_and_state/exercise.js
@@ -82,7 +82,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this
diff --git a/exercises/props/exercise.js b/exercises/props/exercise.js
index 5b819d1..e1aa9f5 100644
--- a/exercises/props/exercise.js
+++ b/exercises/props/exercise.js
@@ -69,7 +69,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this;
diff --git a/exercises/props_from_server/exercise.js b/exercises/props_from_server/exercise.js
index 184466e..9b5b5d1 100644
--- a/exercises/props_from_server/exercise.js
+++ b/exercises/props_from_server/exercise.js
@@ -82,7 +82,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this;
diff --git a/exercises/props_from_server/solution/solution.js b/exercises/props_from_server/solution/solution.js
index 1d772ab..4150227 100644
--- a/exercises/props_from_server/solution/solution.js
+++ b/exercises/props_from_server/solution/solution.js
@@ -4,19 +4,20 @@ var app = express();
 app.set('port', (process.argv[2] || 3000));
 app.set('view engine', 'jsx');
 app.set('views', __dirname + '/views');
-app.engine('jsx', require('express-react-views').createEngine({ transformViews: false }));
+app.engine('jsx', require('express-react-views').createEngine({transformViews: false}));
 
 require('babel/register')({
-	ignore: false
+    ignore: false
 });
 
 var data = [
-	{ title: 'Shopping', detail: process.argv[3] },
-	{ title: 'Hair cut', detail: process.argv[4] }
+    {title: 'Shopping', detail: process.argv[3]},
+    {title: 'Hair cut', detail: process.argv[4]}
 ];
 
-app.use('/', function(req, res) {
-	res.render('index', {data: data});
+app.use('/', function (req, res) {
+    res.render('index', {data: data});
 });
 
-app.listen(app.get('port'), function() {});
+app.listen(app.get('port'), function () {
+});
diff --git a/exercises/proptypes/exercise.js b/exercises/proptypes/exercise.js
index 5b819d1..e1aa9f5 100644
--- a/exercises/proptypes/exercise.js
+++ b/exercises/proptypes/exercise.js
@@ -69,7 +69,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this;
diff --git a/exercises/proptypes/solution/solution.js b/exercises/proptypes/solution/solution.js
index 6ed84db..f8cd9e7 100644
--- a/exercises/proptypes/solution/solution.js
+++ b/exercises/proptypes/solution/solution.js
@@ -4,14 +4,15 @@ var app = express();
 app.set('port', (process.argv[2] || 3000));
 app.set('view engine', 'jsx');
 app.set('views', __dirname + '/views');
-app.engine('jsx', require('express-react-views').createEngine({ transformViews: false }));
+app.engine('jsx', require('express-react-views').createEngine({transformViews: false}));
 
 require('babel/register')({
-	ignore: false
+    ignore: false
 });
 
-app.use('/', function(req, res) {
-	res.render('index', '');
+app.use('/', function (req, res) {
+    res.render('index', '');
 });
 
-app.listen(app.get('port'), function() {});
+app.listen(app.get('port'), function () {
+});
diff --git a/exercises/state/exercise.js b/exercises/state/exercise.js
index 0a4ce80..4bca705 100644
--- a/exercises/state/exercise.js
+++ b/exercises/state/exercise.js
@@ -69,7 +69,7 @@ exercise.addProcessor(function (mode, callback) {
     });
 });
 
-// delayed for 5000ms to wait for servers to start so we can start
+// delayed for 3000ms to wait for servers to start so we can start
 // playing with them
 function query(mode) {
     var exercise = this;
diff --git a/exercises/state/solution/solution.js b/exercises/state/solution/solution.js
index 6ed84db..f8cd9e7 100644
--- a/exercises/state/solution/solution.js
+++ b/exercises/state/solution/solution.js
@@ -4,14 +4,15 @@ var app = express();
 app.set('port', (process.argv[2] || 3000));
 app.set('view engine', 'jsx');
 app.set('views', __dirname + '/views');
-app.engine('jsx', require('express-react-views').createEngine({ transformViews: false }));
+app.engine('jsx', require('express-react-views').createEngine({transformViews: false}));
 
 require('babel/register')({
-	ignore: false
+    ignore: false
 });
 
-app.use('/', function(req, res) {
-	res.render('index', '');
+app.use('/', function (req, res) {
+    res.render('index', '');
 });
 
-app.listen(app.get('port'), function() {});
+app.listen(app.get('port'), function () {
+});