diff --git a/Gemfile b/Gemfile
index 250d886555132c907065293c3ad068a141b1f02e..651fa6cb4e3da70bfb3daf21fd3e2a4419d9fdde 100644
--- a/Gemfile
+++ b/Gemfile
@@ -535,7 +535,7 @@ gem 'valid_email', '~> 0.1'
 # JSON
 gem 'json', '~> 2.5.1'
 gem 'json_schemer', '~> 0.2.18'
-gem 'oj', '~> 3.13.20'
+gem 'oj', '~> 3.13.21'
 gem 'multi_json', '~> 1.14.1'
 gem 'yajl-ruby', '~> 1.4.3', require: 'yajl'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 4f1b544933647604d87246527f8b52adb9f0e57f..f5d3e9c2baec30dd72dbe5ac91afff0d0a7673c3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -887,7 +887,7 @@ GEM
       plist (~> 3.1)
       train-core
       wmi-lite (~> 1.0)
-    oj (3.13.20)
+    oj (3.13.21)
     omniauth (1.9.1)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
@@ -1652,7 +1652,7 @@ DEPENDENCIES
   oauth2 (~> 2.0)
   octokit (~> 4.15)
   ohai (~> 16.10)
-  oj (~> 3.13.20)
+  oj (~> 3.13.21)
   omniauth (~> 1.8)
   omniauth-alicloud (~> 1.0.1)
   omniauth-atlassian-oauth2 (~> 0.2.0)