diff --git a/inc/admin/namespace.php b/inc/admin/namespace.php
index 2c05d6a..0f0eadc 100644
--- a/inc/admin/namespace.php
+++ b/inc/admin/namespace.php
@@ -73,16 +73,10 @@ function get_config() {
 		return [];
 	}
 
-	$settings['sp'] = [
-		'entityId'                 => $sp_home_url,
-		'assertionConsumerService' => [
-			'url' => $sp_base_url . 'verify',
-		],
-		'singleLogoutService'      => [
-			'url' => $sp_base_url . 'sls',
-		],
-		'NameIDFormat'             => 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
-	];
+	$settings['sp']['entityId']                 = $sp_home_url;
+	$settings['sp']['assertionConsumerService'] = [ 'url' => $sp_base_url . 'verify' ];
+	$settings['sp']['singleLogoutService']      = [ 'url' => $sp_base_url . 'sls' ];
+	$settings['sp']['NameIDFormat']             = 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress';
 
 	return $settings;
 }
diff --git a/inc/namespace.php b/inc/namespace.php
index 43f9a90..3e04058 100644
--- a/inc/namespace.php
+++ b/inc/namespace.php
@@ -41,13 +41,15 @@ function bootstrap() {
 	add_action( 'template_redirect', __NAMESPACE__ . '\\endpoint', 9 );
 	add_action( 'login_message', __NAMESPACE__ . '\\login_form_link' );
 	add_action( 'wp_authenticate', __NAMESPACE__ . '\\authenticate_with_sso' );
-	add_action( 'wp_logout', __NAMESPACE__ . '\\go_home' );
+	add_action( 'wp_logout', __NAMESPACE__ . '\\logout' );
 
 	add_action( 'wpsimplesaml_action_login', __NAMESPACE__ . '\\cross_site_sso' );
 	add_action( 'wpsimplesaml_action_verify', __NAMESPACE__ . '\\cross_site_sso' );
+	add_action( 'wpsimplesaml_action_sls', __NAMESPACE__ . '\\cross_site_sso' );
 
 	add_action( 'wpsimplesaml_action_login', __NAMESPACE__ . '\\action_login' );
 	add_action( 'wpsimplesaml_action_verify', __NAMESPACE__ . '\\action_verify' );
+	add_action( 'wpsimplesaml_action_sls', __NAMESPACE__ . '\\action_sls' );
 	add_action( 'wpsimplesaml_action_metadata', __NAMESPACE__ . '\\action_metadata' );
 
 	add_action( 'wpsimplesaml_user_created', __NAMESPACE__ . '\\map_user_roles', 10, 2 );
@@ -273,6 +275,43 @@ function action_verify() {
 	}
 }
 
+/**
+ * Handle sso/sls endpoint.
+ *
+ * @action wpsimplesaml_action_sls
+ */
+function action_sls() {
+	$saml = instance();
+
+	try {
+		/*
+		 * If it's logout request, we just clear the user session. The user will be redirected to
+		 * the IdP by the php-saml.
+		 * If it's logout responce, the IdP has ended user's session, php-saml will not do
+		 * anything else, so we will redirect at the end.
+		 */
+		$saml->processSLO( false, null, true, __NAMESPACE__ . '\signout' );
+	} catch ( \Exception $e ) {
+		$errors = $e->getMessage();
+	}
+
+	if ( $errors ) {
+		/* translators: %s = error message */
+		wp_die( sprintf( esc_html__( 'Error: Could not parse the logout response, please forward this error to your administrator: "%s"', 'wp-simple-saml' ), esc_html( $errors ) ) );
+	}
+
+	if ( ! empty( $saml->getErrors() ) ) {
+		$errors = implode( ', ', $saml->getErrors() );
+
+		/* translators: %s = error message */
+		wp_die( sprintf( esc_html__( 'Error: Could not parse the logout response, please forward this error to your administrator: "%s"', 'wp-simple-saml' ), esc_html( $errors ) ) );
+	}
+
+	$redirect_url = get_redirection_url();
+	wp_safe_redirect( $redirect_url );
+	exit;
+}
+
 /**
  * Output metadata of SP
  *
@@ -533,6 +572,27 @@ function signon( $user ) {
 	wp_set_auth_cookie( $user->ID, true, is_ssl() );
 }
 
+/**
+ * Sign out the user, delete session and auth cookie.
+ */
+function signout() {
+	wp_destroy_current_session();
+	wp_clear_auth_cookie();
+}
+
+/**
+ * Send LogoutRequest to IdP when user logs out.
+ */
+function logout() {
+	// Bail if no SAML2_Auth instance is available, mainly if no configuration was found
+	if ( ! instance() ) {
+		return;
+	}
+
+	$redirect_url = get_redirection_url();
+	instance()->logout( $redirect_url );
+}
+
 /**
  * Forward IdP response to another site
  *