diff --git a/Gemfile b/Gemfile
index e7a1423ce2f..3083d514c22 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,7 +38,7 @@ gem 'redis-session-store', github: '18F/redis-session-store', branch: 'master'
 gem 'rqrcode'
 gem 'ruby-progressbar'
 gem 'ruby-saml'
-gem 'saml_idp', git: 'https://github.com/18F/saml_idp.git', tag: 'v0.4.1-18f'
+gem 'saml_idp', git: 'https://github.com/18F/saml_idp.git', tag: 'v0.4.2-18f'
 gem 'sass-rails', '~> 5.0'
 gem 'savon'
 gem 'scrypt'
diff --git a/Gemfile.lock b/Gemfile.lock
index a0d77980dcb..f2fe58eb369 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,8 +29,8 @@ GIT
 
 GIT
   remote: https://github.com/18F/saml_idp.git
-  revision: 9c1a308bb0c454bd603218f1f156a45a69cb50f2
-  tag: v0.4.1-18f
+  revision: bcc3144468571b11c0136dde4b5e7f76562db060
+  tag: v0.4.2-18f
   specs:
     saml_idp (0.4.0)
       activesupport