diff --git a/composer.json b/composer.json
index a55190d..c6e3e52 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
         }
     ],
 	"require": {
-        "phpseclib/phpseclib" : "2.0.1"
+        "phpseclib/phpseclib" : "3.0.42"
 	},
 	"extra": {
 		"installer-name": "IsekaiOIDC"
diff --git a/includes/IsekaiOIDCAuth.php b/includes/IsekaiOIDCAuth.php
index 130ad24..cb9d2ab 100644
--- a/includes/IsekaiOIDCAuth.php
+++ b/includes/IsekaiOIDCAuth.php
@@ -266,13 +266,11 @@ class IsekaiOIDCAuth extends AbstractPrimaryAuthenticationProvider {
         }
         if ( isset( $config['scope'] ) ) {
             $scope = $config['scope'];
-            if ( is_array( $scope ) ) {
-                foreach ( $scope as $s ) {
-                    $oidc->addScope( $s );
-                }
-            } else {
-                $oidc->addScope( $scope );
+            if ( ! is_array( $scope ) ) {
+                $scope = [ $scope ];
             }
+			
+            $oidc->addScope( $scope );
         }
         if ( isset( $config['proxy'] ) ) {
             $oidc->setHttpProxy( $config['proxy'] );
diff --git a/includes/SpecialIsekaiOIDCCallback.php b/includes/SpecialIsekaiOIDCCallback.php
index c735b40..87eff4d 100644
--- a/includes/SpecialIsekaiOIDCCallback.php
+++ b/includes/SpecialIsekaiOIDCCallback.php
@@ -35,7 +35,7 @@ class SpecialIsekaiOIDCCallback extends LoginSignupSpecialPage {
 	}
 
 	public function getDescription() {
-		return $this->msg( 'login' )->text();
+		return $this->msg( 'login' );
 	}
 
 	public function setHeaders() {
diff --git a/lib/openid-connect-php/OpenIDConnectClient.php b/lib/openid-connect-php/OpenIDConnectClient.php
index ac6bf18..8ddeb64 100644
--- a/lib/openid-connect-php/OpenIDConnectClient.php
+++ b/lib/openid-connect-php/OpenIDConnectClient.php
@@ -734,13 +734,11 @@ class OpenIDConnectClient
     /**
      * Start Here
      * @return void
-     * @throws OpenIDConnectClientException
-     * @throws Exception
      */
-    private function requestAuthorization() {
-
-        $auth_endpoint = $this->getProviderConfigValue('authorization_endpoint');
-        $response_type = 'code';
+    public function getAuthorizationUrl()
+    {
+        $auth_endpoint = $this->getProviderConfigValue("authorization_endpoint");
+        $response_type = "code";
 
         // Generate and store a nonce in the session
         // The nonce is an arbitrary value
@@ -749,45 +747,29 @@ class OpenIDConnectClient
         // State essentially acts as a session key for OIDC
         $state = $this->setState($this->generateRandString());
 
-        $auth_params = array_merge($this->authParams, [
+        $auth_params = array_merge($this->authParams, array(
             'response_type' => $response_type,
             'redirect_uri' => $this->getRedirectURL(),
             'client_id' => $this->clientID,
             'nonce' => $nonce,
             'state' => $state,
             'scope' => 'openid'
-        ]);
+        ));
 
         // If the client has been registered with additional scopes
-        if (count($this->scopes) > 0) {
-            $auth_params = array_merge($auth_params, ['scope' => implode(' ', array_merge($this->scopes, ['openid']))]);
+        if (sizeof($this->scopes) > 0) {
+            $auth_params = array_merge($auth_params, array('scope' => implode(' ', $this->scopes)));
         }
 
         // If the client has been registered with additional response types
-        if (count($this->responseTypes) > 0) {
-            $auth_params = array_merge($auth_params, ['response_type' => implode(' ', $this->responseTypes)]);
+        if (sizeof($this->responseTypes) > 0) {
+            $auth_params = array_merge($auth_params, array('response_type' => implode(' ', $this->responseTypes)));
         }
 
-        // If the client supports Proof Key for Code Exchange (PKCE)
-        $codeChallengeMethod = $this->getCodeChallengeMethod();
-        if (!empty($codeChallengeMethod) && in_array($codeChallengeMethod, $this->getProviderConfigValue('code_challenge_methods_supported', []), true)) {
-            $codeVerifier = bin2hex(random_bytes(64));
-            $this->setCodeVerifier($codeVerifier);
-            if (!empty($this->pkceAlgs[$codeChallengeMethod])) {
-                $codeChallenge = rtrim(strtr(base64_encode(hash($this->pkceAlgs[$codeChallengeMethod], $codeVerifier, true)), '+/', '-_'), '=');
-            } else {
-                $codeChallenge = $codeVerifier;
-            }
-            $auth_params = array_merge($auth_params, [
-                'code_challenge' => $codeChallenge,
-                'code_challenge_method' => $codeChallengeMethod
-            ]);
-        }
+        $auth_endpoint .= (strpos($auth_endpoint, '?') === false ? '?' : '&') . http_build_query($auth_params);
 
-        $auth_endpoint .= (strpos($auth_endpoint, '?') === false ? '?' : '&') . http_build_query($auth_params, '', '&', $this->encType);
-
-        $this->commitSession();
-        $this->redirect($auth_endpoint);
+        session_commit();
+        return $auth_endpoint;
     }
 
     /**
@@ -967,7 +949,7 @@ class OpenIDConnectClient
         }
 
         // Convert token params to string format
-        $post_params = http_build_query($post_data, null, '&', $this->encType);
+        $post_params = http_build_query($post_data, '', '&', $this->encType);
 
         return json_decode($this->fetchURL($token_endpoint, $post_params, $headers), false);
     }