diff --git a/Gemfile b/Gemfile
index 608284b..3f24486 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,7 +28,7 @@ gem 'rails_warden',         '~> 0.5.8'
 gem 'pundit',               '~> 0.3.0'
 gem 'rack-robustness',      '~> 1.1.0'
 gem 'rack-rewrite',         '~> 1.5.0'
-gem 'oj',                   '~> 2.11'
+gem 'oj',                   '~> 2.17.4'
 gem 'oj_mimic_json',        '~> 1.0'
 gem 'foreigner',            '~> 1.7'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 1c193a6..6b139a7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -145,7 +145,7 @@ GEM
     net-ssh (2.6.8)
     netrc (0.10.3)
     nokogiri (1.5.11)
-    oj (2.11.5)
+    oj (2.17.4)
     oj_mimic_json (1.0.1)
     open4 (1.3.0)
     parallel (0.7.1)
@@ -331,7 +331,7 @@ DEPENDENCIES
   immigrant
   jquery-rails (~> 3.0.4)
   kaminari (~> 0.14.1)
-  oj (~> 2.11)
+  oj (~> 2.17.4)
   oj_mimic_json (~> 1.0)
   open4 (~> 1.3.0)
   pg (~> 0.14)