diff --git a/Gemfile b/Gemfile
index 42db0812755..bc0b549c4d9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -47,7 +47,7 @@ gem 'omniauth-rails_csrf_protection', '~> 0.1'
 
 gem 'color_diff', '~> 0.1'
 gem 'discard', '~> 1.2'
-gem 'doorkeeper', '~> 5.5'
+gem 'doorkeeper', '~> 5.6'
 gem 'ed25519', '~> 1.2'
 gem 'fast_blank', '~> 1.0'
 gem 'fastimage'
diff --git a/Gemfile.lock b/Gemfile.lock
index 99569b8a97b..71500c4a8d7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -190,7 +190,7 @@ GEM
     docile (1.3.4)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
-    doorkeeper (5.5.2)
+    doorkeeper (5.6.6)
       railties (>= 5)
     dotenv (2.7.6)
     dotenv-rails (2.7.6)
@@ -216,7 +216,7 @@ GEM
       faraday (~> 1)
       multi_json
     encryptor (3.0.0)
-    erubi (1.10.0)
+    erubi (1.12.0)
     et-orbi (1.2.4)
       tzinfo
     excon (0.76.0)
@@ -289,7 +289,7 @@ GEM
     httplog (1.5.0)
       rack (>= 1.0)
       rainbow (>= 2.0.0)
-    i18n (1.8.10)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
     i18n-tasks (0.9.34)
       activesupport (>= 4.0.2)
@@ -352,9 +352,9 @@ GEM
       activesupport (>= 4)
       railties (>= 4)
       request_store (~> 1.0)
-    loofah (2.19.1)
+    loofah (2.21.3)
       crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
+      nokogiri (>= 1.12.0)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     makara (0.5.1)
@@ -374,8 +374,8 @@ GEM
       nokogiri (~> 1)
       rake
     mini_mime (1.1.1)
-    mini_portile2 (2.8.1)
-    minitest (5.14.4)
+    mini_portile2 (2.8.2)
+    minitest (5.18.0)
     msgpack (1.4.2)
     multi_json (1.15.0)
     multipart-post (2.1.1)
@@ -461,7 +461,7 @@ GEM
     pundit (2.1.1)
       activesupport (>= 3.0.0)
     raabro (1.4.0)
-    racc (1.6.2)
+    racc (1.7.0)
     rack (2.2.6.4)
     rack-attack (6.5.0)
       rack (>= 1.0, < 3)
@@ -475,8 +475,8 @@ GEM
       rack (>= 2.1.0)
     rack-proxy (0.7.0)
       rack
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
+    rack-test (2.1.0)
+      rack (>= 1.3)
     rails (6.1.4.1)
       actioncable (= 6.1.4.1)
       actionmailbox (= 6.1.4.1)
@@ -664,7 +664,7 @@ GEM
     twitter-text (3.1.0)
       idn-ruby
       unf (~> 0.1.0)
-    tzinfo (2.0.4)
+    tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     tzinfo-data (1.2021.1)
       tzinfo (>= 1.0.0)
@@ -713,7 +713,7 @@ GEM
     xorcist (1.1.2)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.4.2)
+    zeitwerk (2.6.8)
 
 PLATFORMS
   ruby
@@ -748,7 +748,7 @@ DEPENDENCIES
   devise-two-factor (~> 4.0.2)
   devise_pam_authenticatable2 (~> 9.2)
   discard (~> 1.2)
-  doorkeeper (~> 5.5)
+  doorkeeper (~> 5.6)
   dotenv-rails (~> 2.7)
   ecko-plugins (~> 0.1.6)
   ecko-plugins-sponsor (~> 0.1.0)