diff --git a/docs/sending/start-submission.mdx b/docs/sending/start-submission.mdx
index 392ae0390fb60ab92680c879a384fb122b858653..244ebb47f20f13b7c68f5a51a0e9f0a45f00738c 100644
--- a/docs/sending/start-submission.mdx
+++ b/docs/sending/start-submission.mdx
@@ -76,7 +76,7 @@ const data = JSON.stringify({
   }
 });
 
-var config = {
+const config = {
   method: 'post',
   url: SUBMISSION_API + '/v1/submissions',
   headers: {