diff --git a/README.md b/README.md
index 2a3b9be..c62d90b 100644
--- a/README.md
+++ b/README.md
@@ -41,8 +41,9 @@ copyright = "© Copyright notice"
     twitter = "Your Twitter username"
     github = "Your GitHub username"
     linkedin = "Your LinkedIn username"
+    googleplus = "Your Google+ user id"
     facebook = "Your Facebook username"
-    stackoverflow = "Your Stackoverflow profile"
+    stackoverflow = "Your Stackoverflow user id (number)"
     # Google Analytics API key.
     ga_api_key = "Your Google Analytics tracking id"
     # Mixpanel API key.
@@ -53,6 +54,7 @@ copyright = "© Copyright notice"
     bio = "Your short bio/tagline"
     # Short subtitle/tagline. This is displayed in the header.
     subtitle = "is a software developer, hardware hacker and a beer lover. He believes in the power of code."
+    themecolor = "#hexcolor" # Defines the tab color in Chrome for Android.
 ```
 
 ## Usage
diff --git a/layouts/partials/header.html b/layouts/partials/header.html
index 0c06441..8546a94 100644
--- a/layouts/partials/header.html
+++ b/layouts/partials/header.html
@@ -4,6 +4,9 @@
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1" />
   <meta property="og:title" content="{{ if ne .URL "/" }} {{ .Title }} &middot; {{ end }} {{ .Site.Title }}" />
+  {{ with .Site.Params.themecolor }}
+  <meta name="theme-color" content="{{ . }}" />
+  {{ end }}
   <meta property="og:site_name" content="{{ .Site.Title }}" />
   <meta property="og:url" content="{{ .Permalink }}" />
   {{ with .Params.images }}{{ range first 5 . }}
diff --git a/layouts/partials/link.html b/layouts/partials/link.html
index 831abae..b3d5714 100644
--- a/layouts/partials/link.html
+++ b/layouts/partials/link.html
@@ -1,7 +1,17 @@
 <div class="sns-links hidden-print">
+  {{ with .Site.Params.contact }}
+  <a href="{{ . }}">
+    <i class="fa fa-envelope"></i>
+  </a>
+  {{ end }}
   {{ with .Site.Params.twitter }}
   <a href="https://twitter.com/{{ . }}" target="_blank">
-      <i class="fa fa-twitter"></i>
+    <i class="fa fa-twitter"></i>
+  </a>
+  {{ end }}
+  {{ with .Site.Params.googleplus }}
+  <a href="https://plus.google.com/+{{ . }}" target="_blank">
+    <i class="fa fa-google"></i>
   </a>
   {{ end }}
   {{ with .Site.Params.facebook }}
@@ -15,12 +25,12 @@
   </a>
   {{ end }}
   {{ with .Site.Params.stackoverflow }}
-  <a href="{{ . }}" target="_blank">
+  <a href="https://stackoverflow.com/users/{{ . }}" target="_blank">
     <i class="fa fa-stack-overflow"></i>
   </a>
   {{ end }}
   {{ with .Site.Params.linkedin }}
-  <a href="https://jp.linkedin.com/in/{{ . }}" target="_blank">
+  <a href="https://linkedin.com/in/{{ . }}" target="_blank">
     <i class="fa fa-linkedin"></i>
   </a>
   {{ end }}
diff --git a/static/css/main.css b/static/css/main.css
index c6ddd85..2b2b8a7 100644
--- a/static/css/main.css
+++ b/static/css/main.css
@@ -1,5 +1,6 @@
 main {
     max-width: 750px;
+    word-wrap: break-word;
 }
 
 /* Header */