diff --git a/Gemfile b/Gemfile
index 78d2a1d34a3..93e495de3b5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -42,7 +42,7 @@ gem 'omniauth-cas', '~> 1.1'
 gem 'omniauth-saml', '~> 1.10'
 gem 'omniauth', '~> 1.9'
 
-gem 'doorkeeper', '~> 5.0'
+gem 'doorkeeper', '~> 5.1'
 gem 'fast_blank', '~> 1.0'
 gem 'fastimage'
 gem 'goldfinger', '~> 2.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index c9e46f27a6e..da1211a648d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -184,8 +184,8 @@ GEM
     docile (1.3.0)
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
-    doorkeeper (5.0.2)
-      railties (>= 4.2)
+    doorkeeper (5.1.0)
+      railties (>= 5)
     dotenv (2.7.2)
     dotenv-rails (2.7.2)
       dotenv (= 2.7.2)
@@ -680,7 +680,7 @@ DEPENDENCIES
   devise (~> 4.6)
   devise-two-factor (~> 3.0)
   devise_pam_authenticatable2 (~> 9.2)
-  doorkeeper (~> 5.0)
+  doorkeeper (~> 5.1)
   dotenv-rails (~> 2.7)
   fabrication (~> 2.20)
   faker (~> 1.9)