Use slim-rails insted of slim in the Gemfile

Gemfile

@@ -12,7 +12,7 @@ gem 'coffee-rails'
 gem 'therubyracer', platforms: :ruby
 gem 'jquery-rails'
 
-gem 'slim'
+gem 'slim-rails'
 
 gem 'rails-i18n'
 

Gemfile.lock

@@ -118,6 +118,11 @@ GEM
     slim (2.0.3)
       temple (~> 0.6.6)
       tilt (>= 1.3.3, < 2.1)
+    slim-rails (2.1.5)
+      actionpack (>= 3.0, < 4.2)
+      activesupport (>= 3.0, < 4.2)
+      railties (>= 3.0, < 4.2)
+      slim (~> 2.0)
     spring (1.1.3)
     spring-commands-rspec (1.0.2)
       spring (>= 0.9.1)
@@ -163,7 +168,7 @@ DEPENDENCIES
   rails-i18n
   rspec-rails
   sass-rails (~> 4.0.3)
-  slim
+  slim-rails
   spring
   spring-commands-rspec
   sqlite3