diff --git a/Gemfile b/Gemfile
index 631f1265f..330222922 100644
--- a/Gemfile
+++ b/Gemfile
@@ -44,7 +44,7 @@ group :pam_authentication, optional: true do
 end
 
 gem 'net-ldap', '~> 0.16'
-gem 'omniauth-cas', '~> 1.1'
+gem 'omniauth-cas', '~> 2.0'
 gem 'omniauth-saml', '~> 1.10'
 gem 'omniauth', '~> 1.9'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 558bfc2b8..dffd7d791 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -371,7 +371,7 @@ GEM
     omniauth (1.9.1)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
-    omniauth-cas (1.1.1)
+    omniauth-cas (2.0.0)
       addressable (~> 2.3)
       nokogiri (~> 1.5)
       omniauth (~> 1.2)
@@ -741,7 +741,7 @@ DEPENDENCIES
   nsa (~> 0.2)
   oj (~> 3.10)
   omniauth (~> 1.9)
-  omniauth-cas (~> 1.1)
+  omniauth-cas (~> 2.0)
   omniauth-saml (~> 1.10)
   ox (~> 2.13)
   paperclip (~> 6.0)