diff --git a/Gemfile b/Gemfile
index 5572dfa..35d677d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem 'composite_primary_keys'
 gem 'underscore-rails'
 gem 'ember-rails'
 gem 'ember-source', '1.5.0'
-gem 'bootstrap-sass', '~> 3.2.0'
+gem 'bootstrap-sass', '~> 3.4.1'
 gem 'active_model_serializers', '~>0.9.0'
 gem 'dotenv'
 gem 'dotenv-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index 130cb34..5eebc95 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,11 +43,14 @@ GEM
     airbrussh (1.3.1)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (6.0.4)
+    autoprefixer-rails (9.6.1)
+      execjs
     barber (0.12.2)
       ember-source (>= 1.0, < 3.1)
       execjs (>= 1.2, < 3)
-    bootstrap-sass (3.2.0.4)
-      sass (~> 3.2)
+    bootstrap-sass (3.4.1)
+      autoprefixer-rails (>= 5.2.1)
+      sassc (>= 2.0.0)
     builder (3.2.3)
     capistrano (3.11.0)
       airbrussh (>= 1.0.0)
@@ -95,7 +98,7 @@ GEM
     factory_girl_rails (4.9.0)
       factory_girl (~> 4.9.0)
       railties (>= 3.0.0)
-    ffi (1.10.0)
+    ffi (1.11.1)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
     handlebars-source (1.3.0)
@@ -195,6 +198,9 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
+    sassc (2.0.1)
+      ffi (~> 1.9)
+      rake
     shoulda-matchers (4.0.1)
       activesupport (>= 4.2.0)
     simplecov (0.16.1)
@@ -232,7 +238,7 @@ PLATFORMS
 
 DEPENDENCIES
   active_model_serializers (~> 0.9.0)
-  bootstrap-sass (~> 3.2.0)
+  bootstrap-sass (~> 3.4.1)
   capistrano
   capistrano-bundler
   capistrano-rails