diff --git a/app.rb b/app.rb
index 13e525bf3956fe7abe340da3a29aee3d8132405c..8a1072741fff516f78772240bb2c2f23dd48d00b 100644
--- a/app.rb
+++ b/app.rb
@@ -104,9 +104,9 @@ helpers do
             # create this user
             @user = User.create(
               username: session['cas']['user'],
-              email: info['mail'][0],
-              first_name: info['givenName'][0],
-              last_name: info['sn'][0],
+              email: info['mail'][0] rescue nil,
+              first_name: info['givenName'][0] rescue nil,
+              last_name: info['sn'][0] rescue nil,
               date_created: Time.now,
               creation_method: 'CAS',
               is_admin: false