diff --git a/signin/index.html b/signin/index.html
index 8c0d6cd73b33850b14779f60228689cb588ba2ba..0b5d9bd950c4fc3aa6728b99e2e5b213ec678b28 100644
--- a/signin/index.html
+++ b/signin/index.html
@@ -21,8 +21,8 @@
 
       <form class="form-signin">
         <h2 class="form-signin-heading">Please sign in</h2>
-        <input type="text" class="input-block-level" placeholder="Email address" autofocus>
-        <input type="password" class="input-block-level" placeholder="Password">
+        <input type="text" class="form-control" placeholder="Email address" autofocus>
+        <input type="password" class="form-control" placeholder="Password">
         <label class="checkbox">
           <input type="checkbox" value="remember-me"> Remember me
         </label>