diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13b22eb7..1d0a5bf0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## [3.5.3] - 2026-06-13
 
 ### Fixed
+- Sparkle no longer advertises the unpublished 3.5.3 release whose public app download returns 404; the entry will return through the normal release flow when the release is published. Thanks @bcharleson for #199.
 - JSON-only `peekaboo see` runs without `--path` now keep required screenshots in snapshot storage instead of leaving files on Desktop or exposing their temporary paths. Thanks @coygeek for #196.
 - Watch captures now honor stop requests during transient ScreenCaptureKit retry backoff instead of waiting out the full delay. Thanks @SebTardif for #193.
 - Peekaboo agent skill install and usage guidance now uses the current `skills/peekaboo` path, treats observed element IDs as opaque, and keeps screenshot artifacts in explicit temporary paths. Thanks @coygeek for #197.
diff --git a/appcast.xml b/appcast.xml
index f64f59ac..b62099ef 100644
--- a/appcast.xml
+++ b/appcast.xml
@@ -7,20 +7,6 @@
     <link>https://raw.githubusercontent.com/openclaw/Peekaboo/main/appcast.xml</link>
     <description>Peekaboo macOS app updates (Sparkle)</description>
     <language>en</language>
-    <item>
-      <title>Peekaboo 3.5.3</title>
-      <link>https://github.com/openclaw/Peekaboo/releases/tag/v3.5.3</link>
-      <sparkle:releaseNotesLink>https://github.com/openclaw/Peekaboo/releases/tag/v3.5.3</sparkle:releaseNotesLink>
-      <pubDate>Sun, 14 Jun 2026 06:05:06 +0000</pubDate>
-      <enclosure
-        url="https://github.com/openclaw/Peekaboo/releases/download/v3.5.3/Peekaboo-3.5.3.app.zip"
-        sparkle:version="3050399"
-        sparkle:shortVersionString="3.5.3"
-        sparkle:minimumSystemVersion="15.0"
-        length="15614454"
-        type="application/octet-stream"
-        sparkle:edSignature="txJ6Oxa40Z4lpcfuMcMqK95aIUAEweHgqUEdSr1NQsDVBP2APCu2R+ypi44UKuxIyQJ3GSTjfW8wFefupsXJDA==" />
-    </item>
     <item>
       <title>Peekaboo 3.5.2</title>
       <link>https://github.com/openclaw/Peekaboo/releases/tag/v3.5.2</link>