diff --git a/Gemfile b/Gemfile
index ce4c26eac09..cd2fb4551f1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -73,7 +73,7 @@ gem 'rqrcode'
 gem 'ruby-progressbar'
 gem 'ruby-saml'
 gem 'safe_target_blank', '>= 1.0.2'
-gem 'saml_idp', github: '18F/saml_idp', tag: '0.21.4-18f'
+gem 'saml_idp', github: '18F/saml_idp', tag: '0.21.6-18f'
 gem 'scrypt'
 gem 'simple_form', '>= 5.0.2'
 gem 'stringex', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 2a48f87a350..80291850552 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,10 +35,10 @@ GIT
 
 GIT
   remote: https://github.com/18F/saml_idp.git
-  revision: 5e9999ef8e9260cda74cfea0a637f754994e0f9d
-  tag: 0.21.4-18f
+  revision: 512ad9b1609884781034773f6c4ccd53e7036a82
+  tag: 0.21.6-18f
   specs:
-    saml_idp (0.21.4.pre.18f)
+    saml_idp (0.21.6.pre.18f)
       activesupport
       builder
       faraday