diff --git a/lib/dashing/app.rb b/lib/dashing/app.rb
index 015ab4a..374866b 100644
--- a/lib/dashing/app.rb
+++ b/lib/dashing/app.rb
@@ -3,7 +3,8 @@
 require 'sinatra/content_for'
 require 'rufus/scheduler'
 require 'coffee-script'
-require 'sass'
+require 'sass' if RUBY_VERSION < "2.5.0"
+require 'sassc' if RUBY_VERSION >= "2.5.0"
 require 'json'
 require 'yaml'
 require 'thin'
diff --git a/smashing.gemspec b/smashing.gemspec
index 27dcc52..fecf37b 100644
--- a/smashing.gemspec
+++ b/smashing.gemspec
@@ -15,7 +15,6 @@ Gem::Specification.new do |s|
 
   s.files = Dir['README.md', 'javascripts/**/*', 'templates/**/*','templates/**/.[a-z]*', 'lib/**/*']
 
-  s.add_dependency('sass', '~> 3.4.24')
   s.add_dependency('coffee-script', '~> 2.4.1')
   s.add_dependency('execjs', '~> 2.7.0')
   if RUBY_VERSION < "2.4.0"
@@ -27,7 +26,13 @@ Gem::Specification.new do |s|
   s.add_dependency('thin', '~> 1.7.0')
   s.add_dependency('rufus-scheduler', '~> 3.4.2')
   s.add_dependency('thor', '~> 0.19.4')
-  s.add_dependency('sprockets', '~> 3.7.1')
+  if RUBY_VERSION < "2.5.0"
+    s.add_dependency('sprockets', '~> 3.7.1')
+    s.add_dependency('sass', '~> 3.4.24')
+  else
+    s.add_dependency('sprockets', '~> 4.0')
+    s.add_dependency('sassc', '~> 2.0')
+  end
   s.add_dependency('rack', '~> 2.0.0')
 
   s.add_development_dependency('rake', '~> 12.3.3')