diff --git a/src/hooks/issuePrRef.js b/src/hooks/issuePrRef.js
index 434411b..10143dd 100644
--- a/src/hooks/issuePrRef.js
+++ b/src/hooks/issuePrRef.js
@@ -17,7 +17,7 @@ module.exports = {
 
         let body = pull_request.body
         if(body.includes('> <code>')) {
-            body = body.replaceAll(/\*\*ISS .+\*\*/g, `**ISS #${issueId}**`)
+            body = body.replaceAll(/\*\*ISS #\d+\*\*/g, `**ISS #${issueId}**`)
         }else {
             body += '\n\n'
             body += `**ISS #${issueId}**`