diff --git a/app/views/devise/registrations/new.html.erb b/app/views/devise/registrations/new.html.erb
index 7226132f9..12840bc84 100644
--- a/app/views/devise/registrations/new.html.erb
+++ b/app/views/devise/registrations/new.html.erb
@@ -6,11 +6,11 @@
   <%= devise_error_messages! %>
 
   <div class="form-group">
-    <%= f.text_field :login, class: 'form-control', placeholder: t(".username"), autofocus: true %>
+    <%= f.text_field :login, class: 'form-control', placeholder: true, autofocus: true %>
   </div>
 
   <div class="form-group">
-    <%= f.email_field :email, class: 'form-control', placeholder: t('.email') %>
+    <%= f.email_field :email, class: 'form-control', placeholder: true %>
   </div>
 
   <div class="form-group">
diff --git a/app/views/devise/sessions/new.html.erb b/app/views/devise/sessions/new.html.erb
index 7e46ab0ba..50e0fefe7 100644
--- a/app/views/devise/sessions/new.html.erb
+++ b/app/views/devise/sessions/new.html.erb
@@ -5,11 +5,11 @@
 <%= form_for(resource, as: resource_name, url: session_path(resource_name)) do |f| %>
   <fieldset>
     <div class="form-group">
-      <%= f.text_field :login, class: 'form-control', placeholder: t('.login'), autofocus: true %>
+      <%= f.text_field :login, class: 'form-control', placeholder: true, autofocus: true %>
     </div>
 
     <div class="form-group">
-      <%= f.password_field :password, class: 'form-control', placeholder: t('.password'), autocomplete: 'off' %>
+      <%= f.password_field :password, class: 'form-control', placeholder: true, autocomplete: 'off' %>
     </div>
 
     <div class="checkbox">
diff --git a/lib/archives_sidebar/app/views/archives_sidebar/_content.html.erb b/lib/archives_sidebar/app/views/archives_sidebar/_content.html.erb
index 7d74c3347..0408211ea 100644
--- a/lib/archives_sidebar/app/views/archives_sidebar/_content.html.erb
+++ b/lib/archives_sidebar/app/views/archives_sidebar/_content.html.erb
@@ -1,11 +1,11 @@
 <% unless sidebar.archives.blank? %>
-  <h3 class="sidebar_title"><%= sidebar.title %></h3>
-  <div class="sidebar_body">
+  <h3 class="sidebar-title"><%= sidebar.title %></h3>
+  <div class="sidebar-body">
     <ul id="archives">
       <% sidebar.archives.each do |month| %>
         <% counter = sidebar.show_count ? "<em>(#{month[:article_count]})</em>" : "" %>
         <li>
-          <%= link_to"#{month[:name]} #{counter}".html_safe,  articles_by_month_path( month[:year], "%02i" % (month[:month]+1) ) %>
+          <%= link_to"#{month[:name]} #{counter}".html_safe,  articles_by_month_path( month[:year], "%02i" % (month[:month]) ) %>
         </li>
       <% end %>
     </ul>