diff --git a/Gemfile b/Gemfile
index 6a995af6..816dfb6f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,7 +24,7 @@ gem 'ruby-progressbar', '~> 1.7', '>= 1.7.5'
 gem 'rubyzip', '~> 1.2.1'
 
 # authentication
-gem 'devise', '~> 3.5.4', require: %w(devise devise/orm/active_record)
+gem 'devise', '~> 4.7.1', require: %w(devise devise/orm/active_record)
 
 # search with elastic search
 gem 'elasticsearch-dsl', '~> 0.1.5'
diff --git a/Gemfile.lock b/Gemfile.lock
index faa0e015..b3ff872b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -80,7 +80,7 @@ GEM
       execjs (~> 2.0)
     backport_new_renderer (1.0.0)
       rails
-    bcrypt (3.1.11)
+    bcrypt (3.1.13)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
     bitly (1.1.0)
@@ -91,7 +91,7 @@ GEM
       autoprefixer-rails (>= 5.0.0.1)
       sass (>= 3.3.0)
     brakeman (4.2.1)
-    builder (3.2.3)
+    builder (3.2.4)
     bullet (5.7.3)
       activesupport (>= 3.0.0)
       uniform_notifier (~> 1.11.0)
@@ -132,11 +132,11 @@ GEM
     coffee-script-source (1.12.2)
     combine_pdf (1.0.5)
       ruby-rc4 (>= 0.1.5)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.6)
     connection_pool (2.2.1)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
-    crass (1.0.3)
+    crass (1.0.6)
     daemons (1.2.6)
     database_cleaner (1.4.1)
     debug_inspector (0.0.2)
@@ -144,12 +144,11 @@ GEM
     declarative-option (0.1.0)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
-    devise (3.5.10)
+    devise (4.7.1)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
-      railties (>= 3.2.6, < 5)
+      railties (>= 4.1.0)
       responders
-      thread_safe (~> 0.1)
       warden (~> 1.2.3)
     diff-lcs (1.3)
     docile (1.1.5)
@@ -306,7 +305,7 @@ GEM
     logging (2.2.2)
       little-plugger (~> 1.1)
       multi_json (~> 1.10)
-    loofah (2.2.2)
+    loofah (2.4.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.9)
@@ -326,7 +325,7 @@ GEM
     mime-types (2.99.3)
     mini_magick (4.8.0)
     mini_portile2 (2.3.0)
-    minitest (5.11.3)
+    minitest (5.14.0)
     mono_logger (1.1.0)
     multi_json (1.13.1)
     multi_xml (0.6.0)
@@ -394,7 +393,7 @@ GEM
     puma (3.4.0)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
-    rack (1.6.10)
+    rack (1.6.13)
     rack-livereload (0.3.16)
       rack
     rack-mini-profiler (0.10.7)
@@ -435,15 +434,15 @@ GEM
       activesupport (>= 4.2.0, < 5.0)
       nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.4)
-      loofah (~> 2.2, >= 2.2.2)
+    rails-html-sanitizer (1.3.0)
+      loofah (~> 2.3)
     railties (4.2.7.1)
       actionpack (= 4.2.7.1)
       activesupport (= 4.2.7.1)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rainbow (3.0.0)
-    rake (12.3.1)
+    rake (13.0.1)
     ransack (1.7.0)
       actionpack (>= 3.0)
       activerecord (>= 3.0)
@@ -471,9 +470,9 @@ GEM
       declarative (< 0.1.0)
       declarative-option (< 0.2.0)
       uber (< 0.2.0)
-    responders (2.4.0)
-      actionpack (>= 4.2.0, < 5.3)
-      railties (>= 4.2.0, < 5.3)
+    responders (2.4.1)
+      actionpack (>= 4.2.0, < 6.0)
+      railties (>= 4.2.0, < 6.0)
     resque (1.27.4)
       mono_logger (~> 1.0)
       multi_json (~> 1.0)
@@ -588,7 +587,7 @@ GEM
     turbolinks (5.1.0)
       turbolinks-source (~> 5.1)
     turbolinks-source (5.1.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.6)
       thread_safe (~> 0.1)
     uber (0.1.0)
     uglifier (3.0.4)
@@ -659,7 +658,7 @@ DEPENDENCIES
   combine_pdf (~> 1.0.5)
   daemons (~> 1.2, >= 1.2.3)
   database_cleaner (~> 1.4)
-  devise (~> 3.5.4)
+  devise (~> 4.7.1)
   dotenv-rails (~> 2.2, >= 2.2.1)
   elasticsearch-dsl (~> 0.1.5)
   elasticsearch-model (~> 5.0, >= 5.0.1)