diff --git a/Gemfile b/Gemfile
index 23bae92..1a3a706 100644
--- a/Gemfile
+++ b/Gemfile
@@ -29,7 +29,7 @@ gem 'jbuilder', '2.5.0'
 # gem 'capistrano-rails', group: :development
 
 # Use Twitter Bootstrap libary for front-end UI and layout
-gem 'bootstrap-sass', '3.3.7'
+gem 'bootstrap-sass', '3.4.1'
 
 # Use Font Awesome sass gem for adding icons
 gem 'font-awesome-sass', '4.6.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index e111730..7f8c2bf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -39,13 +39,13 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     arel (7.1.4)
-    autoprefixer-rails (9.4.4)
+    autoprefixer-rails (9.7.4)
       execjs
     bcrypt (3.1.12)
     bindex (0.5.0)
-    bootstrap-sass (3.3.7)
+    bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
-      sass (>= 3.3.4)
+      sassc (>= 2.0.0)
     builder (3.2.3)
     byebug (10.0.2)
     climate_control (0.2.0)
@@ -70,7 +70,7 @@ GEM
       unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
     execjs (2.7.0)
-    ffi (1.9.25)
+    ffi (1.12.1)
     figaro (1.1.1)
       thor (~> 0.14)
     font-awesome-sass (4.6.2)
@@ -147,7 +147,7 @@ GEM
       thor (>= 0.18.1, < 2.0)
     rake (12.3.2)
     rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
+    rb-inotify (0.10.1)
       ffi (~> 1.0)
     responders (2.4.1)
       actionpack (>= 4.2.0, < 6.0)
@@ -156,7 +156,7 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    sass (3.7.3)
+    sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -167,6 +167,8 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
+    sassc (2.2.1)
+      ffi (~> 1.9)
     spring (1.7.2)
     spring-watcher-listen (2.0.0)
       listen (>= 2.7, < 4.0)
@@ -209,7 +211,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  bootstrap-sass (= 3.3.7)
+  bootstrap-sass (= 3.4.1)
   byebug
   coffee-rails (= 4.2.1)
   devise (= 4.2.0)