diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4f3cc17..06423ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
+## [v4.1.1]
+
+### Fixed
+
+- Fix requiring of oauth2 to avoid `NoMethodError: undefined method 'config' for module OAuth2` (#86)
+
 ## [v4.1.0]
 
 ### Added
@@ -140,7 +146,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - rails model concern to allow host app to add auth behaviour to a model
 - callback, logout and failure routes to handle auth
 
-[Unreleased]: https://github.com/RaspberryPiFoundation/rpi-auth/compare/v4.1.0...HEAD
+[Unreleased]: https://github.com/RaspberryPiFoundation/rpi-auth/compare/v4.1.1...HEAD
+[v4.1.1]: https://github.com/RaspberryPiFoundation/rpi-auth/releases/tag/v4.1.1
 [v4.1.0]: https://github.com/RaspberryPiFoundation/rpi-auth/releases/tag/v4.1.0
 [v4.0.0]: https://github.com/RaspberryPiFoundation/rpi-auth/releases/tag/v4.0.0
 [v3.6.0]: https://github.com/RaspberryPiFoundation/rpi-auth/releases/tag/v3.6.0
diff --git a/gemfiles/rails_6.1.gemfile.lock b/gemfiles/rails_6.1.gemfile.lock
index a31eb0f..ca46109 100644
--- a/gemfiles/rails_6.1.gemfile.lock
+++ b/gemfiles/rails_6.1.gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    rpi_auth (4.1.0)
+    rpi_auth (4.1.1)
       oauth2
       omniauth-rails_csrf_protection (~> 1.0.0)
       omniauth_openid_connect (~> 0.7.1)
diff --git a/gemfiles/rails_7.0.gemfile.lock b/gemfiles/rails_7.0.gemfile.lock
index f497483..fdc0288 100644
--- a/gemfiles/rails_7.0.gemfile.lock
+++ b/gemfiles/rails_7.0.gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    rpi_auth (4.1.0)
+    rpi_auth (4.1.1)
       oauth2
       omniauth-rails_csrf_protection (~> 1.0.0)
       omniauth_openid_connect (~> 0.7.1)
diff --git a/gemfiles/rails_7.1.gemfile.lock b/gemfiles/rails_7.1.gemfile.lock
index 93f5597..f9956a9 100644
--- a/gemfiles/rails_7.1.gemfile.lock
+++ b/gemfiles/rails_7.1.gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    rpi_auth (4.1.0)
+    rpi_auth (4.1.1)
       oauth2
       omniauth-rails_csrf_protection (~> 1.0.0)
       omniauth_openid_connect (~> 0.7.1)
diff --git a/gemfiles/rails_7.2.gemfile.lock b/gemfiles/rails_7.2.gemfile.lock
index 1d94f4c..c07b9c9 100644
--- a/gemfiles/rails_7.2.gemfile.lock
+++ b/gemfiles/rails_7.2.gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    rpi_auth (4.1.0)
+    rpi_auth (4.1.1)
       oauth2
       omniauth-rails_csrf_protection (~> 1.0.0)
       omniauth_openid_connect (~> 0.7.1)
diff --git a/lib/rpi_auth/controllers/auto_refreshing_token.rb b/lib/rpi_auth/controllers/auto_refreshing_token.rb
index aee9a3c..698b1fa 100644
--- a/lib/rpi_auth/controllers/auto_refreshing_token.rb
+++ b/lib/rpi_auth/controllers/auto_refreshing_token.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require 'oauth2/error'
+require 'oauth2'
 
 module RpiAuth
   module Controllers
diff --git a/lib/rpi_auth/oauth_client.rb b/lib/rpi_auth/oauth_client.rb
index 135b830..9d78022 100644
--- a/lib/rpi_auth/oauth_client.rb
+++ b/lib/rpi_auth/oauth_client.rb
@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
-require 'oauth2/client'
-require 'oauth2/access_token'
+require 'oauth2'
 
 module RpiAuth
   class OauthClient
diff --git a/lib/rpi_auth/version.rb b/lib/rpi_auth/version.rb
index c9f156b..a82ed1d 100644
--- a/lib/rpi_auth/version.rb
+++ b/lib/rpi_auth/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module RpiAuth
-  VERSION = '4.1.0'
+  VERSION = '4.1.1'
 end
diff --git a/spec/dummy/spec/requests/refresh_credentials_spec.rb b/spec/dummy/spec/requests/refresh_credentials_spec.rb
index f01a4d5..7c7ca82 100644
--- a/spec/dummy/spec/requests/refresh_credentials_spec.rb
+++ b/spec/dummy/spec/requests/refresh_credentials_spec.rb
@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-require 'oauth2/error'
+require 'oauth2'
 
 RSpec.describe 'Refreshing the auth token', type: :request do
   include ActiveSupport::Testing::TimeHelpers
diff --git a/spec/rpi_auth/oauth_client_spec.rb b/spec/rpi_auth/oauth_client_spec.rb
index d5c42c7..215fd15 100644
--- a/spec/rpi_auth/oauth_client_spec.rb
+++ b/spec/rpi_auth/oauth_client_spec.rb
@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'oauth2'
 
 RSpec.describe RpiAuth::OauthClient do
   include ActiveSupport::Testing::TimeHelpers