diff --git a/appcast-prerelease.xml b/appcast-prerelease.xml
index c551c4fb..796915e5 100644
--- a/appcast-prerelease.xml
+++ b/appcast-prerelease.xml
@@ -43,7 +43,7 @@
                 url="https://github.com/amantus-ai/vibetunnel/releases/download/v1.0.0-beta.3/VibeTunnel-1.0.0-beta.3.dmg"
                 length="20156342"
                 type="application/octet-stream"
-                sparkle:edSignature="kY87vo1HXpFx6aKb9LDXbe/AmQND5iH+W7a3qpf2AejmEl+i7wKch/JY3zhBHrmWIuksiKOwFIIklT4sQFMjDw=="
+                sparkle:edSignature="d4G5pUTLuoRUMVg+SSHHaupV2QycU3fEXJhzFjXNSB79htcVo3mGn+oaABL1suvCMJTBK7shJJQS3mf7yDFQDg=="
             />
             <sparkle:minimumSystemVersion>14.0</sparkle:minimumSystemVersion>
         </item>