diff --git a/Gemfile b/Gemfile
index ee80bb5..1cc5cd0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -26,7 +26,7 @@ gem 'jbuilder', '~> 2.0'
 gem 'sdoc', '~> 0.4.0', group: :doc
 
 gem 'simple_form'
-gem 'bootstrap-sass', '~> 3.3.6'
+gem 'bootstrap-sass', '~> 3.4.1'
 
 # Use ActiveModel has_secure_password
 # gem 'bcrypt', '~> 3.1.7'
diff --git a/Gemfile.lock b/Gemfile.lock
index 0f68e7a..1d813ff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -41,9 +41,9 @@ GEM
       execjs
     binding_of_caller (0.8.0)
       debug_inspector (>= 0.0.1)
-    bootstrap-sass (3.3.7)
+    bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
-      sass (>= 3.3.4)
+      sassc (>= 2.0.0)
     builder (3.2.4)
     byebug (11.1.1)
     coffee-rails (4.1.1)
@@ -148,6 +148,8 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
+    sassc (2.2.1)
+      ffi (~> 1.9)
     sdoc (0.4.2)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
@@ -189,7 +191,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  bootstrap-sass (~> 3.3.6)
+  bootstrap-sass (~> 3.4.1)
   byebug
   coffee-rails (~> 4.1.0)
   jbuilder (~> 2.0)