diff --git a/Gemfile.lock b/Gemfile.lock
index 1fe6279..f0e2670 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -73,12 +73,12 @@ GEM
       activesupport (>= 3.0.0)
     arel (7.1.4)
     ast (2.3.0)
-    autoprefixer-rails (6.5.4)
+    autoprefixer-rails (9.4.9)
       execjs
     bcrypt (3.1.11)
-    bootstrap-sass (3.3.7)
+    bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
-      sass (>= 3.3.4)
+      sassc (>= 2.0.0)
     bootstrap-select-rails (1.6.3)
     bourbon (4.3.4)
       sass (~> 3.4)
@@ -275,13 +275,20 @@ GEM
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.8.1)
-    sass (3.4.23)
+    sass (3.7.3)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     sass-rails (5.0.6)
       railties (>= 4.0.0, < 6)
       sass (~> 3.1)
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
+    sassc (2.0.1)
+      ffi (~> 1.9)
+      rake
     sentry-raven (2.7.3)
       faraday (>= 0.7.6, < 1.0)
     sidekiq (4.2.10)