diff --git a/server/utils/s3.js b/server/utils/s3.js
index ffe4867c..1e423390 100644
--- a/server/utils/s3.js
+++ b/server/utils/s3.js
@@ -17,7 +17,7 @@ export const makePolicy = () => {
       { bucket: process.env.AWS_S3_UPLOAD_BUCKET_NAME },
       ['starts-with', '$key', ''],
       { acl: 'public-read' },
-      ['content-length-range', 0, process.env.AWS_S3_UPLOAD_MAX_SIZE],
+      ['content-length-range', 0, +process.env.AWS_S3_UPLOAD_MAX_SIZE],
       ['starts-with', '$Content-Type', 'image'],
       ['starts-with', '$Cache-Control', ''],
     ],