--- a/Gemfile.lock	Sat Apr 14 04:19:29 2018 +0900
+++ b/Gemfile.lock	Sat Apr 14 04:19:52 2018 +0900
@@ -2,50 +2,54 @@
   remote: https://rubygems.org/
   remote: https://rails-assets.org/
   specs:
-    actioncable (5.1.4)
-      actionpack (= 5.1.4)
+    actioncable (5.2.0)
+      actionpack (= 5.2.0)
       nio4r (~> 2.0)
-      websocket-driver (~> 0.6.1)
-    actionmailer (5.1.4)
-      actionpack (= 5.1.4)
-      actionview (= 5.1.4)
-      activejob (= 5.1.4)
+      websocket-driver (>= 0.6.1)
+    actionmailer (5.2.0)
+      actionpack (= 5.2.0)
+      actionview (= 5.2.0)
+      activejob (= 5.2.0)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.1.4)
-      actionview (= 5.1.4)
-      activesupport (= 5.1.4)
+    actionpack (5.2.0)
+      actionview (= 5.2.0)
+      activesupport (= 5.2.0)
       rack (~> 2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.1.4)
-      activesupport (= 5.1.4)
+    actionview (5.2.0)
+      activesupport (= 5.2.0)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.1.4)
-      activesupport (= 5.1.4)
+    activejob (5.2.0)
+      activesupport (= 5.2.0)
       globalid (>= 0.3.6)
-    activemodel (5.1.4)
-      activesupport (= 5.1.4)
-    activerecord (5.1.4)
-      activemodel (= 5.1.4)
-      activesupport (= 5.1.4)
-      arel (~> 8.0)
+    activemodel (5.2.0)
+      activesupport (= 5.2.0)
+    activerecord (5.2.0)
+      activemodel (= 5.2.0)
+      activesupport (= 5.2.0)
+      arel (>= 9.0)
     activerecord-jdbc-adapter (50.0)
       activerecord (>= 2.2)
     activerecord-jdbcpostgresql-adapter (50.0)
       activerecord-jdbc-adapter (~> 50.0)
       jdbc-postgres (>= 9.4, < 43)
-    activesupport (5.1.4)
+    activestorage (5.2.0)
+      actionpack (= 5.2.0)
+      activerecord (= 5.2.0)
+      marcel (~> 0.3.1)
+    activesupport (5.2.0)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    arel (8.0.0)
-    autoprefixer-rails (7.2.2)
+    arel (9.0.0)
+    autoprefixer-rails (8.2.0)
       execjs
     bootstrap-sass (3.3.7)
       autoprefixer-rails (>= 5.2.1)
@@ -60,14 +64,14 @@
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
     concurrent-ruby (1.0.5-java)
-    crass (1.0.3)
-    erubi (1.7.0)
+    crass (1.0.4)
+    erubi (1.7.1)
     execjs (2.7.0)
-    ffi (1.9.18)
-    ffi (1.9.18-java)
+    ffi (1.9.23)
+    ffi (1.9.23-java)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
-    i18n (0.9.1)
+    i18n (1.0.0)
       concurrent-ruby (~> 1.0)
     jdbc-postgres (42.1.4)
     jquery-rails (4.3.1)
@@ -75,57 +79,61 @@
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     jruby-openssl (0.9.21-java)
-    loofah (2.1.1)
+    loofah (2.2.2)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.0)
       mini_mime (>= 0.1.1)
+    marcel (0.3.2)
+      mimemagic (~> 0.3.2)
     method_source (0.9.0)
+    mimemagic (0.3.2)
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
-    minitest (5.10.3)
-    newrelic_rpm (4.6.0.338)
-    nio4r (2.1.0)
-    nio4r (2.1.0-java)
-    nokogiri (1.8.1)
+    minitest (5.11.3)
+    newrelic_rpm (5.0.0.342)
+    nio4r (2.3.0)
+    nio4r (2.3.0-java)
+    nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
-    nokogiri (1.8.1-java)
-    pg (0.21.0)
-    puma (3.11.0)
-    puma (3.11.0-java)
-    rack (2.0.3)
-    rack-test (0.8.2)
+    nokogiri (1.8.2-java)
+    pg (1.0.0)
+    puma (3.11.4)
+    puma (3.11.4-java)
+    rack (2.0.4)
+    rack-test (1.0.0)
       rack (>= 1.0, < 3)
-    rails (5.1.4)
-      actioncable (= 5.1.4)
-      actionmailer (= 5.1.4)
-      actionpack (= 5.1.4)
-      actionview (= 5.1.4)
-      activejob (= 5.1.4)
-      activemodel (= 5.1.4)
-      activerecord (= 5.1.4)
-      activesupport (= 5.1.4)
+    rails (5.2.0)
+      actioncable (= 5.2.0)
+      actionmailer (= 5.2.0)
+      actionpack (= 5.2.0)
+      actionview (= 5.2.0)
+      activejob (= 5.2.0)
+      activemodel (= 5.2.0)
+      activerecord (= 5.2.0)
+      activestorage (= 5.2.0)
+      activesupport (= 5.2.0)
       bundler (>= 1.3.0)
-      railties (= 5.1.4)
+      railties (= 5.2.0)
       sprockets-rails (>= 2.0.0)
     rails-assets-commonmark (0.28.1)
     rails-assets-highlightjs (9.12.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
-    railties (5.1.4)
-      actionpack (= 5.1.4)
-      activesupport (= 5.1.4)
+    rails-html-sanitizer (1.0.4)
+      loofah (~> 2.2, >= 2.2.2)
+    railties (5.2.0)
+      actionpack (= 5.2.0)
+      activesupport (= 5.2.0)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (12.3.0)
-    rb-fsevent (0.10.2)
+    rake (12.3.1)
+    rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    sass (3.5.3)
+    sass (3.5.6)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -150,13 +158,13 @@
     thread_safe (0.3.6)
     thread_safe (0.3.6-java)
     tilt (2.0.8)
-    tzinfo (1.2.4)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.0.1)
+    uglifier (4.1.9)
       execjs (>= 0.3.0, < 3)
-    websocket-driver (0.6.5)
+    websocket-driver (0.7.0)
       websocket-extensions (>= 0.1.0)
-    websocket-driver (0.6.5-java)
+    websocket-driver (0.7.0-java)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.3)
 
@@ -167,18 +175,18 @@
 DEPENDENCIES
   activerecord-jdbcpostgresql-adapter
   bootstrap-sass
-  coffee-rails (~> 4.2)
+  coffee-rails
   jquery-rails
   jruby-openssl
   newrelic_rpm
   pg
   puma
-  rails (~> 5.1.0)
+  rails (~> 5.2.0)
   rails-assets-commonmark!
   rails-assets-highlightjs!
-  sass-rails (~> 5.0)
+  sass-rails
   therubyrhino
-  uglifier (>= 1.3.0)
+  uglifier
 
 BUNDLED WITH
-   1.16.0
+   1.16.1