diff --git a/server.js b/server.js
index 7aee9bb00..30688bb25 100644
--- a/server.js
+++ b/server.js
@@ -860,7 +860,7 @@ async function charaWrite(img_url, data, target_img, response = undefined, mes =
         let rawImg = await jimp.read(img_url);
 
         // Apply crop if defined
-        if (typeof crop == 'object') {
+        if (typeof crop == 'object' && [crop.x, crop.y, crop.width, crop.height].every(x => typeof x === 'number')) {
             rawImg = rawImg.crop(crop.x, crop.y, crop.width, crop.height);
         }