diff --git a/Gemfile b/Gemfile
index 6abb075c1ce..c01e2eed25b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -65,7 +65,6 @@ gem 'mario-redis-lock', '~> 1.2', require: 'redis_lock'
 gem 'mime-types', '~> 3.6.0', require: 'mime/types/columnar'
 gem 'mutex_m'
 gem 'nokogiri', '~> 1.15'
-gem 'oj', '~> 3.14'
 gem 'ox', '~> 2.14'
 gem 'parslet'
 gem 'premailer-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index 8bd67e67bee..e99dfc513cf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -429,9 +429,6 @@ GEM
     nokogiri (1.17.2)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    oj (3.16.8)
-      bigdecimal (>= 3.0)
-      ostruct (>= 0.2)
     omniauth (2.1.2)
       hashie (>= 3.4.6)
       rack (>= 2.2.3)
@@ -950,7 +947,6 @@ DEPENDENCIES
   net-http (~> 0.5.0)
   net-ldap (~> 0.18)
   nokogiri (~> 1.15)
-  oj (~> 3.14)
   omniauth (~> 2.0)
   omniauth-cas (~> 3.0.0.beta.1)
   omniauth-rails_csrf_protection (~> 1.0)
diff --git a/config/initializers/oj.rb b/config/initializers/oj.rb
deleted file mode 100644
index 9b2d9086371..00000000000
--- a/config/initializers/oj.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-# frozen_string_literal: true
-
-Oj.default_options = { mode: :compat, time_format: :ruby, use_to_json: true }