-# We need ruby-openid 2.2.0 or later for ruby 1.9 support
-gem "ruby-openid", ">= 2.2.0"
+# Sanitise URIs
+gem "rack-uri_sanitizer"
+
+# Omniauth for authentication
+gem "omniauth"
+gem "omniauth-openid"
+gem "omniauth-google-oauth2", ">= 0.2.7"
+gem "omniauth-facebook"
+gem "omniauth-windowslive"
+gem "omniauth-github"
+gem "omniauth-mediawiki", ">= 0.0.3"