diff --git a/Gemfile.lock b/Gemfile.lock
index 569e48e0..a26a2341 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ PATH
       acts_as_list (~> 0.9.11)
       browser (~> 2.5.3)
       carrierwave (~> 1.2.2)
-      devise (~> 4.6.2)
+      devise (~> 4.8.1)
       jquery-rails (~> 4.3.1)
       jquery-ui-rails (~> 6.0.1)
       judge (~> 3.0.0)
@@ -128,10 +128,10 @@ GEM
     daemons (1.2.6)
     database_cleaner (1.6.2)
     debug_inspector (0.0.3)
-    devise (4.6.2)
+    devise (4.8.1)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
-      railties (>= 4.1.0, < 6.0)
+      railties (>= 4.1.0)
       responders
       warden (~> 1.2.3)
     diff-lcs (1.3)
diff --git a/fae.gemspec b/fae.gemspec
index 071efc01..a812f23f 100644
--- a/fae.gemspec
+++ b/fae.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'acts_as_list', '~> 0.9.11'
   s.add_dependency 'browser', '~> 2.5.3'
   s.add_dependency 'carrierwave', '~> 1.2.2'
-  s.add_dependency 'devise', '~> 4.6.2'
+  s.add_dependency 'devise', '~> 4.8.1'
   s.add_dependency 'jquery-ui-rails', '~> 6.0.1'
   s.add_dependency 'mini_magick'
   s.add_dependency 'judge', '~> 3.0.0'
diff --git a/gemfiles/rails_5_0.gemfile.lock b/gemfiles/rails_5_0.gemfile.lock
index 1d7408fc..1d9c9f4f 100644
--- a/gemfiles/rails_5_0.gemfile.lock
+++ b/gemfiles/rails_5_0.gemfile.lock
@@ -13,7 +13,7 @@ PATH
       acts_as_list (~> 0.9.11)
       browser (~> 2.5.3)
       carrierwave (~> 1.2.2)
-      devise (~> 4.6.2)
+      devise (~> 4.8.1)
       jquery-rails (~> 4.3.1)
       jquery-ui-rails (~> 6.0.1)
       judge (~> 3.0.0)
@@ -124,10 +124,10 @@ GEM
     daemons (1.2.6)
     database_cleaner (1.6.2)
     debug_inspector (0.0.3)
-    devise (4.6.2)
+    devise (4.8.1)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
-      railties (>= 4.1.0, < 6.0)
+      railties (>= 4.1.0)
       responders
       warden (~> 1.2.3)
     diff-lcs (1.3)
diff --git a/gemfiles/rails_5_1.gemfile.lock b/gemfiles/rails_5_1.gemfile.lock
index 4bca0040..ed602e2a 100644
--- a/gemfiles/rails_5_1.gemfile.lock
+++ b/gemfiles/rails_5_1.gemfile.lock
@@ -13,7 +13,7 @@ PATH
       acts_as_list (~> 0.9.11)
       browser (~> 2.5.3)
       carrierwave (~> 1.2.2)
-      devise (~> 4.6.2)
+      devise (~> 4.8.1)
       jquery-rails (~> 4.3.1)
       jquery-ui-rails (~> 6.0.1)
       judge (~> 3.0.0)
@@ -124,10 +124,10 @@ GEM
     daemons (1.2.6)
     database_cleaner (1.6.2)
     debug_inspector (0.0.3)
-    devise (4.6.2)
+    devise (4.8.1)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
-      railties (>= 4.1.0, < 6.0)
+      railties (>= 4.1.0)
       responders
       warden (~> 1.2.3)
     diff-lcs (1.3)
diff --git a/gemfiles/rails_5_2.gemfile.lock b/gemfiles/rails_5_2.gemfile.lock
index 55e119ef..a056ab37 100644
--- a/gemfiles/rails_5_2.gemfile.lock
+++ b/gemfiles/rails_5_2.gemfile.lock
@@ -13,7 +13,7 @@ PATH
       acts_as_list (~> 0.9.11)
       browser (~> 2.5.3)
       carrierwave (~> 1.2.2)
-      devise (~> 4.6.2)
+      devise (~> 4.8.1)
       jquery-rails (~> 4.3.1)
       jquery-ui-rails (~> 6.0.1)
       judge (~> 3.0.0)
@@ -128,10 +128,10 @@ GEM
     daemons (1.2.6)
     database_cleaner (1.6.2)
     debug_inspector (0.0.3)
-    devise (4.6.2)
+    devise (4.8.1)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
-      railties (>= 4.1.0, < 6.0)
+      railties (>= 4.1.0)
       responders
       warden (~> 1.2.3)
     diff-lcs (1.3)