diff --git a/Gemfile.lock b/Gemfile.lock
index 2cc483e..cfc634e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -41,13 +41,13 @@ GEM
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
     arel (8.0.0)
-    autoprefixer-rails (7.1.6)
+    autoprefixer-rails (9.7.0)
       execjs
     bindex (0.5.0)
-    bootstrap (4.0.0.beta2.1)
-      autoprefixer-rails (>= 6.0.3)
-      popper_js (>= 1.12.3, < 2)
-      sass (>= 3.5.2)
+    bootstrap (4.3.1)
+      autoprefixer-rails (>= 9.1.0)
+      popper_js (>= 1.14.3, < 2)
+      sassc-rails (>= 2.0.0)
     builder (3.2.3)
     byebug (9.1.0)
     capybara (2.15.4)
@@ -72,7 +72,8 @@ GEM
       unf (>= 0.0.5, < 1.0.0)
     erubi (1.7.0)
     execjs (2.7.0)
-    ffi (1.9.18-x64-mingw32)
+    ffi (1.11.1)
+    ffi (1.11.1-x64-mingw32)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
     http-cookie (1.0.3)
@@ -101,9 +102,11 @@ GEM
     multi_json (1.12.2)
     netrc (0.11.0)
     nio4r (2.1.0)
+    nokogiri (1.8.1)
+      mini_portile2 (~> 2.3.0)
     nokogiri (1.8.1-x64-mingw32)
       mini_portile2 (~> 2.3.0)
-    popper_js (1.12.5)
+    popper_js (1.14.5)
     public_suffix (3.0.1)
     puma (3.10.0)
     rack (2.0.3)
@@ -133,16 +136,20 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (12.2.1)
-    rb-fsevent (0.10.2)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-fsevent (0.10.3)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
+    rest-client (2.0.2)
+      http-cookie (>= 1.0.2, < 2.0)
+      mime-types (>= 1.16, < 4.0)
+      netrc (~> 0.8)
     rest-client (2.0.2-x64-mingw32)
       ffi (~> 1.9)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
     rubyzip (1.2.1)
-    sass (3.5.3)
+    sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -153,6 +160,16 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
+    sassc (2.2.1)
+      ffi (~> 1.9)
+    sassc (2.2.1-x64-mingw32)
+      ffi (~> 1.9)
+    sassc-rails (2.1.2)
+      railties (>= 4.0.0)
+      sassc (>= 2.0)
+      sprockets (> 3.0)
+      sprockets-rails
+      tilt
     selenium-webdriver (3.7.0)
       childprocess (~> 0.5)
       rubyzip (~> 1.0)
@@ -163,6 +180,7 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    sqlite3 (1.3.13)
     sqlite3 (1.3.13-x64-mingw32)
     thor (0.20.0)
     thread_safe (0.3.6)
@@ -178,6 +196,7 @@ GEM
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
+    unf_ext (0.0.7.4)
     unf_ext (0.0.7.4-x64-mingw32)
     web-console (3.5.1)
       actionview (>= 5.0)
@@ -191,6 +210,7 @@ GEM
       nokogiri (~> 1.3)
 
 PLATFORMS
+  ruby
   x64-mingw32
 
 DEPENDENCIES