diff --git a/gulpfile.js b/gulpfile.js
index 5938e46..d219d8d 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -310,7 +310,7 @@ async function publishToFoundry(done) {
 
   const responseData = await response.text();
 
-  if (responseData.contains('success')) {
+  if (responseData.includes('success')) {
     console.log('Successfully published to Foundry VTT:');
     console.log(JSON.stringify(responseData, null, 2));
     done();