diff --git a/VENDOR CHANGES.md b/VENDOR CHANGES.md
index a358b43..bf34ad6 100644
--- a/VENDOR CHANGES.md	
+++ b/VENDOR CHANGES.md	
@@ -5,3 +5,6 @@ List here the hacks that need to be done in the 'vendor' folder.
 
 * pixelfear/oauth2-dropbox
 => nothing to do, just saying that I actually use a personal fork of this rep where I changed the require version of League oauth2.
+
+* learningpool/oauth2-signonotron
+=> open src/Provider/signonotron.ini.dist, add your site's URL, and save the file as signonotron.ini
diff --git a/auth.php b/auth.php
index 9b06144..a7016b8 100644
--- a/auth.php
+++ b/auth.php
@@ -230,7 +230,8 @@ public function loginpage_hook() {
                             break;
                         case 'github':
                         case 'dropbox':
-                            // As Github/Dropbox doesn't provide firstname/lastname, we'll split the name at the first whitespace.
+                        case 'signonotron':
+                            // As Github/Dropbox/Signonotron doesn't provide firstname/lastname, we'll split the name at the first whitespace.
                             $githubusername = explode(' ', $userdetails->name, 2);
                             $newuser->firstname = $githubusername[0];
                             $newuser->lastname = $githubusername[1];
@@ -406,7 +407,7 @@ public function loginpage_hook() {
                 $content = str_replace(array("\n", "\r"), array("\\\n", "\\\r"), auth_googleoauth2_display_buttons(false));
                 $PAGE->requires->css('/auth/googleoauth2/style.css');
                 $PAGE->requires->js_init_code("buttonsCodeOauth2 = '$content';");
-                $PAGE->requires->js(new moodle_url($CFG->wwwroot . "/auth/googleoauth2/script.js"));
+                $PAGE->requires->js(new moodle_url($CFG->httpswwwroot . "/auth/googleoauth2/script.js"));
             }
         }
     }
@@ -645,6 +646,7 @@ function drawChart() {
                       [\'Dropbox\', ' . $providerstats->dropbox . ' ],
                       [\'VK\', ' . $providerstats->vk . ' ],
                       [\'Battle.net\', ' . $providerstats->battlenet . ' ],
+                      [\'Sign-On-O-Tron\', ' . $providerstats->signonotron . ' ],
                       [\''.$strothermoodle.'\',    ' . $providerstats->moodle . ' ]
                     ]);
 
@@ -660,7 +662,8 @@ function drawChart() {
                         5: { color: \'#007ee5\'},
                         6: { color: \'#45668e\'},
                         7: { color: \'#00B4FF\'},
-                        8: { color: \'#ee7600\'}
+                        8: { color: \'#ee7600\'},
+                        9: { color: \'#c900ad\'}
                       }
                     };
 
@@ -695,6 +698,7 @@ public function get_stats($periodindays = 60) {
                              'vk' => 0,
                              'battlenet' => 0,
                              'moodle' => 0,
+                             'signonotron' => 0,
                              'periodindays' => $periodindays);
 
         // Retrieve the provider stats.
diff --git a/classes/provider/signonotron.php b/classes/provider/signonotron.php
new file mode 100644
index 0000000..16782f2
--- /dev/null
+++ b/classes/provider/signonotron.php
@@ -0,0 +1,68 @@
+<?php
+// This file is part of Oauth2 authentication plugin for Moodle.
+//
+// Oauth2 authentication plugin for Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Oauth2 authentication plugin for Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Oauth2 authentication plugin for Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+require_once($CFG->dirroot . '/auth/googleoauth2/vendor/autoload.php');
+
+class provideroauth2signonotron extends Learningpool\OAuth2\Client\Provider\Signonotron {
+
+    // THE VALUES YOU WANT TO CHANGE WHEN CREATING A NEW PROVIDER.
+    public $sskstyle = 'signonotron';
+    public $name = 'signonotron'; // It must be the same as the XXXXX in the class name provideroauth2XXXXX.
+    public $readablename = 'Sign-On-O-Tron';
+    public $scopes = array();
+
+    /**
+     * Constructor.
+     *
+     * @throws Exception
+     * @throws dml_exception
+     */
+    public function __construct() {
+        global $CFG;
+
+        parent::__construct([
+            'clientId'      => get_config('auth/googleoauth2', $this->name . 'clientid'),
+            'clientSecret'  => get_config('auth/googleoauth2', $this->name . 'clientsecret'),
+            'redirectUri'   => preg_replace('/http:/',
+                'https:', $CFG->httpswwwroot .'/auth/googleoauth2/' . $this->name . '_redirect.php', 1),
+            'scopes'        => $this->scopes
+        ]);
+    }
+
+    /**
+     * Is the provider enabled.
+     *
+     * @return bool
+     * @throws Exception
+     * @throws dml_exception
+     */
+    public function isenabled() {
+        return (get_config('auth/googleoauth2', $this->name . 'clientid')
+            && get_config('auth/googleoauth2', $this->name . 'clientsecret'));
+    }
+
+    /**
+     * The html button.
+     *
+     * @param $authurl
+     * @param $providerdisplaystyle
+     * @return string
+     * @throws coding_exception
+     */
+    public function html_button($authurl, $providerdisplaystyle) {
+        return googleoauth2_html_button($authurl, $providerdisplaystyle, $this);
+    }
+}
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 5e0d70e..89f1de6 100644
--- a/composer.json
+++ b/composer.json
@@ -8,6 +8,7 @@
     "require": {
         "league/oauth2-client": "^0.12.1",
         "depotwarehouse/oauth2-bnet": "^3.0",
-        "pixelfear/oauth2-dropbox": "dev-bugfix"
+        "pixelfear/oauth2-dropbox": "dev-bugfix",
+        "learningpool/oauth2-signonotron": "dev-master"
     }
 }
diff --git a/lang/en/auth_googleoauth2.php b/lang/en/auth_googleoauth2.php
index b29f7c6..8cbdc20 100644
--- a/lang/en/auth_googleoauth2.php
+++ b/lang/en/auth_googleoauth2.php
@@ -96,6 +96,13 @@
 $string['auth_microsoftclientid_key'] = 'Microsoft v2 Application ID';
 $string['auth_microsoftclientsecret'] = '';
 $string['auth_microsoftclientsecret_key'] = 'Microsoft v2 Application secret';
+$string['auth_signonotronclientid'] = 'Information on how to generate the Sign-On-O-Tron Client ID/Secret can be found <a href = "https://github.com/alphagov/signonotron2/blob/master/doc/usage.md" target="_blank">here</a>. Sign-On-O-Tron only accepts HTTPS. Sign-On-O-Tron requires some additional setup, see VENDOR CHANGES.md and the readme at: googleoauth2/vendor/learningpool/oauth2-signonotron/README.md
+<br/>Site URL: {$a->siteurl}
+<br/>Site domain: {$a->sitedomain}
+<br/>Valid OAuth redirect URIs: {$a->callbackurl}';
+$string['auth_signonotronclientid_key'] = 'Sign-On-O-Tron Client ID';
+$string['auth_signonotronclientsecret'] = 'See above.';
+$string['auth_signonotronclientsecret_key'] = 'Sign-On-O-Tron Client secret';
 $string['microsoft_failure'] = 'Did not receive an authorization code from the Microsoft servers.';
 $string['auth_googlesettings'] = 'Settings';
 $string['couldnotauthenticate'] = 'The authentication failed - Please try to sign-in again.';
diff --git a/lib.php b/lib.php
index 7939c69..c790c11 100644
--- a/lib.php
+++ b/lib.php
@@ -40,7 +40,7 @@ function googleoauth2_html_button($authurl, $providerdisplaystyle, $provider) {
  * @return array
  */
 function provider_list() {
-    return array('google', 'facebook', 'battlenet', 'github', 'linkedin', 'messenger', 'microsoft', 'vk', 'dropbox');
+    return array('google', 'facebook', 'battlenet', 'github', 'linkedin', 'messenger', 'microsoft', 'vk', 'dropbox', 'signonotron');
 }
 
 /**
diff --git a/signonotron_redirect.php b/signonotron_redirect.php
new file mode 100644
index 0000000..cdaa712
--- /dev/null
+++ b/signonotron_redirect.php
@@ -0,0 +1,19 @@
+<?php
+// This file is part of Oauth2 authentication plugin for Moodle.
+//
+// Oauth2 authentication plugin for Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Oauth2 authentication plugin for Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Oauth2 authentication plugin for Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+require('../../config.php');
+require_once($CFG->dirroot . '/auth/googleoauth2/lib.php');
+googleoauth2_provider_redirect('signonotron');
\ No newline at end of file