diff --git a/lib/WP_Auth0_Routes.php b/lib/WP_Auth0_Routes.php
index b13ef431..6610a40e 100755
--- a/lib/WP_Auth0_Routes.php
+++ b/lib/WP_Auth0_Routes.php
@@ -124,7 +124,7 @@ protected function migration_ws_login() {
 				throw new Exception( 'Unauthorized: missing authorization header' );
 			}
 
-			$token = JWT::decode( $authorization, $secret, array(  $this->a0_options->get_client_signing_algorithm() ) );
+			$token = JWT::decode( $authorization, $secret, array( 'HS256' ) );
 
 			if ( $token->jti != $token_id ) {
 				throw new Exception( 'Invalid token id' );