diff --git a/VibeTunnel/version.xcconfig b/VibeTunnel/version.xcconfig
index 5a15e8c1..52bf9fb8 100644
--- a/VibeTunnel/version.xcconfig
+++ b/VibeTunnel/version.xcconfig
@@ -2,7 +2,7 @@
 // This file contains the version and build number for the app
 
 MARKETING_VERSION = 1.0.0-beta.2
-CURRENT_PROJECT_VERSION = 104
+CURRENT_PROJECT_VERSION = 105
 
 // Domain and GitHub configuration
 APP_DOMAIN = vibetunnel.sh
diff --git a/appcast-prerelease.xml b/appcast-prerelease.xml
index 91fc1876..8d95428a 100644
--- a/appcast-prerelease.xml
+++ b/appcast-prerelease.xml
@@ -5,39 +5,6 @@
         <link>https://github.com/amantus-ai/vibetunnel</link>
         <description>VibeTunnel pre-release and beta updates feed</description>
         <language>en</language>
-        <item>
-            <title>VibeTunnel 1.0.0-beta.2</title>
-            <link>https://github.com/amantus-ai/vibetunnel/releases/download/v1.0.0-beta.2/VibeTunnel-1.0.0-beta.2.dmg</link>
-            <sparkle:version>104</sparkle:version>
-            <sparkle:shortVersionString>1.0.0-beta.2</sparkle:shortVersionString>
-            <description><![CDATA[
-                <h2>VibeTunnel 1.0.0-beta.2</h2><p><strong>Pre-release version</strong></p><div><h3>🎨 Improvements</h3>
-<ul>
-<li>Redesigned slick new web frontend</li>
-<li>Faster terminal rendering in the web frontend</li>
-<li>New Sessions spawn new Terminal windows. (This needs Applescript and Accessibility permissions)</li>
-<li>Enhanced font handling with system font priority</li>
-<li>Better async operations in PTY service for improved performance</li>
-<li>Improved window activation when showing the welcome and settings windows</li>
-<li>Preparations for Linux support</li>
-</ul>
-<h3>🐛 Bug Fixes</h3>
-<ul>
-<li>Fixed window front order when dock icon is hidden</li>
-<li>Fixed PTY service enhancements with proper async operations</li>
-<li>Fixed race condition in session creation that caused frontend to open previous session</li>
-</ul>
-<p><a href="https://github.com/amantus-ai/vibetunnel/blob/main/CHANGELOG.md#100-beta2-20250619">View full changelog</a></p></div>
-            ]]></description>
-            <pubDate>Thu, 19 Jun 2025 02:14:36 +0200</pubDate>
-            <enclosure 
-                url="https://github.com/amantus-ai/vibetunnel/releases/download/v1.0.0-beta.2/VibeTunnel-1.0.0-beta.2.dmg"
-                length="22202042"
-                type="application/octet-stream"
-                sparkle:edSignature="r8U74pQQyFwBlYOtO+6yd8vAM+JfFBwYDlkbFPLCyTmc9CANqenfP1SCi3MJROvAV/ajsqCRGDbtR3+3+hAkAg=="
-            />
-            <sparkle:minimumSystemVersion>15.0</sparkle:minimumSystemVersion>
-        </item>
         <item>
             <title>VibeTunnel 1.0-beta.1</title>
             <link>https://github.com/amantus-ai/vibetunnel/releases/download/v1.0-beta.1/VibeTunnel-1.0-beta.1.dmg</link>
diff --git a/scripts/codesign-app.sh b/scripts/codesign-app.sh
index cb6f61a7..a89e08a1 100755
--- a/scripts/codesign-app.sh
+++ b/scripts/codesign-app.sh
@@ -89,26 +89,26 @@ if [ -d "$APP_BUNDLE/Contents/Frameworks" ]; then
     log "Signing embedded frameworks..."
     find "$APP_BUNDLE/Contents/Frameworks" \( -type d -name "*.framework" -o -type f -name "*.dylib" \) 2>/dev/null | while read -r framework; do
         log "Signing framework: $framework"
-        codesign --force --options runtime --sign "$SIGN_IDENTITY" $KEYCHAIN_OPTS "$framework" || log "Warning: Failed to sign $framework"
+        codesign --force --options runtime --timestamp --sign "$SIGN_IDENTITY" $KEYCHAIN_OPTS "$framework" || log "Warning: Failed to sign $framework"
     done
 fi
 
 # Sign embedded binaries (like tty-fwd)
 if [ -f "$APP_BUNDLE/Contents/Resources/tty-fwd" ]; then
     log "Signing tty-fwd binary..."
-    codesign --force --options runtime --sign "$SIGN_IDENTITY" $KEYCHAIN_OPTS "$APP_BUNDLE/Contents/Resources/tty-fwd" || log "Warning: Failed to sign tty-fwd"
+    codesign --force --options runtime --timestamp --sign "$SIGN_IDENTITY" $KEYCHAIN_OPTS "$APP_BUNDLE/Contents/Resources/tty-fwd" || log "Warning: Failed to sign tty-fwd"
 fi
 
 # Sign the main executable
 log "Signing main executable..."
-codesign --force --options runtime --entitlements "$TMP_ENTITLEMENTS" --sign "$SIGN_IDENTITY" $KEYCHAIN_OPTS "$APP_BUNDLE/Contents/MacOS/VibeTunnel" || true
+codesign --force --options runtime --timestamp --entitlements "$TMP_ENTITLEMENTS" --sign "$SIGN_IDENTITY" $KEYCHAIN_OPTS "$APP_BUNDLE/Contents/MacOS/VibeTunnel" || true
 
 # Sign the app bundle WITHOUT deep signing (per Sparkle documentation)
 # "Due to different code signing requirements, please do not add --deep to 
 # OTHER_CODE_SIGN_FLAGS or from custom build scripts when signing your application. 
 # This is a common source of Sandboxing errors."
 log "Signing complete app bundle (without --deep per Sparkle requirements)..."
-codesign --force --options runtime --entitlements "$TMP_ENTITLEMENTS" --sign "$SIGN_IDENTITY" $KEYCHAIN_OPTS "$APP_BUNDLE"
+codesign --force --options runtime --timestamp --entitlements "$TMP_ENTITLEMENTS" --sign "$SIGN_IDENTITY" $KEYCHAIN_OPTS "$APP_BUNDLE"
 
 # Verify the signature
 log "Verifying code signature..."
diff --git a/scripts/notarize-app.sh b/scripts/notarize-app.sh
index 108ed8d2..b8345794 100755
--- a/scripts/notarize-app.sh
+++ b/scripts/notarize-app.sh
@@ -188,28 +188,29 @@ if [ -n "${KEYCHAIN_NAME:-}" ]; then
 fi
 
 # Sign XPC services (directories, not files)
+# IMPORTANT: Do NOT use --deep flag, sign each component individually
 if [ -d "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Installer.xpc" ]; then
-    codesign -f -s "$SIGN_IDENTITY" -o runtime $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Installer.xpc"
+    codesign -f -s "$SIGN_IDENTITY" -o runtime --timestamp $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Installer.xpc"
     log "Signed Installer.xpc"
 fi
 if [ -d "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Downloader.xpc" ]; then
     # For Sparkle versions >= 2.6, preserve entitlements
-    codesign -f -s "$SIGN_IDENTITY" -o runtime --preserve-metadata=entitlements $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Downloader.xpc"
+    codesign -f -s "$SIGN_IDENTITY" -o runtime --timestamp --preserve-metadata=entitlements $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Downloader.xpc"
     log "Signed Downloader.xpc"
 fi
 
 # Sign other Sparkle components
 if [ -f "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/Autoupdate" ]; then
-    codesign -f -s "$SIGN_IDENTITY" -o runtime $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/Autoupdate"
+    codesign -f -s "$SIGN_IDENTITY" -o runtime --timestamp $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/Autoupdate"
     log "Signed Autoupdate"
 fi
 if [ -d "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/Updater.app" ]; then
-    codesign -f -s "$SIGN_IDENTITY" -o runtime $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/Updater.app"
+    codesign -f -s "$SIGN_IDENTITY" -o runtime --timestamp $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework/Versions/B/Updater.app"
     log "Signed Updater.app"
 fi
 
 # Finally sign the framework itself
-codesign -f -s "$SIGN_IDENTITY" -o runtime $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework"
+codesign -f -s "$SIGN_IDENTITY" -o runtime --timestamp $keychain_opts "$APP_BUNDLE/Contents/Frameworks/Sparkle.framework"
 log "Signed Sparkle.framework"
 
 # 2. Sparkle framework is already signed above per documentation
diff --git a/scripts/release.sh b/scripts/release.sh
index 1b66224b..00fc5fe5 100755
--- a/scripts/release.sh
+++ b/scripts/release.sh
@@ -331,6 +331,56 @@ echo ""
 echo -e "${BLUE}📋 Step 5/8: Signing and notarizing...${NC}"
 "$SCRIPT_DIR/sign-and-notarize.sh" --sign-and-notarize
 
+# Verify Sparkle component signing
+echo ""
+echo -e "${BLUE}🔍 Verifying Sparkle component signatures...${NC}"
+SPARKLE_OK=true
+
+# Check each Sparkle component for proper signing with timestamps
+if [ -d "$APP_PATH/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Installer.xpc" ]; then
+    if ! codesign -dv "$APP_PATH/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Installer.xpc" 2>&1 | grep -q "timestamp"; then
+        echo -e "${RED}❌ Installer.xpc missing timestamp signature${NC}"
+        SPARKLE_OK=false
+    else
+        echo "✅ Installer.xpc properly signed with timestamp"
+    fi
+fi
+
+if [ -d "$APP_PATH/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Downloader.xpc" ]; then
+    if ! codesign -dv "$APP_PATH/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Downloader.xpc" 2>&1 | grep -q "timestamp"; then
+        echo -e "${RED}❌ Downloader.xpc missing timestamp signature${NC}"
+        SPARKLE_OK=false
+    else
+        echo "✅ Downloader.xpc properly signed with timestamp"
+    fi
+fi
+
+if [ -f "$APP_PATH/Contents/Frameworks/Sparkle.framework/Versions/B/Autoupdate" ]; then
+    if ! codesign -dv "$APP_PATH/Contents/Frameworks/Sparkle.framework/Versions/B/Autoupdate" 2>&1 | grep -q "timestamp"; then
+        echo -e "${RED}❌ Autoupdate missing timestamp signature${NC}"
+        SPARKLE_OK=false
+    else
+        echo "✅ Autoupdate properly signed with timestamp"
+    fi
+fi
+
+if [ -d "$APP_PATH/Contents/Frameworks/Sparkle.framework/Versions/B/Updater.app" ]; then
+    if ! codesign -dv "$APP_PATH/Contents/Frameworks/Sparkle.framework/Versions/B/Updater.app" 2>&1 | grep -q "timestamp"; then
+        echo -e "${RED}❌ Updater.app missing timestamp signature${NC}"
+        SPARKLE_OK=false
+    else
+        echo "✅ Updater.app properly signed with timestamp"
+    fi
+fi
+
+if [ "$SPARKLE_OK" = false ]; then
+    echo -e "${RED}❌ Sparkle component signing verification failed!${NC}"
+    echo "This will cause 'update isn't properly signed' errors for users."
+    exit 1
+fi
+
+echo -e "${GREEN}✅ All Sparkle components properly signed${NC}"
+
 # Step 5: Create DMG
 echo ""
 echo -e "${BLUE}📋 Step 6/8: Creating DMG...${NC}"
@@ -381,6 +431,47 @@ fi
 
 echo -e "${GREEN}✅ DMG notarization complete and verified${NC}"
 
+# Verify app inside DMG is properly signed
+echo ""
+echo -e "${BLUE}🔍 Verifying app inside DMG...${NC}"
+
+# Mount the DMG temporarily
+DMG_MOUNT=$(mktemp -d)
+if hdiutil attach "$DMG_PATH" -mountpoint "$DMG_MOUNT" -nobrowse -quiet; then
+    DMG_APP="$DMG_MOUNT/VibeTunnel.app"
+    
+    # Check if app is notarized
+    if spctl -a -t exec -vv "$DMG_APP" 2>&1 | grep -q "source=Notarized Developer ID"; then
+        echo "✅ App in DMG is properly notarized"
+    else
+        echo -e "${RED}❌ App in DMG is not properly notarized!${NC}"
+        hdiutil detach "$DMG_MOUNT" -quiet
+        exit 1
+    fi
+    
+    # Check if notarization ticket is stapled
+    if xcrun stapler validate "$DMG_APP" 2>&1 | grep -q "The validate action worked"; then
+        echo "✅ App in DMG has stapled notarization ticket"
+    else
+        echo -e "${RED}❌ App in DMG missing stapled notarization ticket!${NC}"
+        hdiutil detach "$DMG_MOUNT" -quiet
+        exit 1
+    fi
+    
+    # Check Sparkle components in DMG
+    if codesign -dv "$DMG_APP/Contents/Frameworks/Sparkle.framework/Versions/B/XPCServices/Installer.xpc" 2>&1 | grep -q "timestamp"; then
+        echo "✅ Sparkle components in DMG properly signed"
+    else
+        echo -e "${YELLOW}⚠️  Warning: Sparkle components in DMG may not have timestamp signatures${NC}"
+    fi
+    
+    # Unmount DMG
+    hdiutil detach "$DMG_MOUNT" -quiet
+    echo -e "${GREEN}✅ App inside DMG verification complete${NC}"
+else
+    echo -e "${YELLOW}⚠️  Warning: Could not mount DMG for verification${NC}"
+fi
+
 # Step 6: Create GitHub release
 echo ""
 echo -e "${BLUE}📋 Step 7/9: Creating GitHub release...${NC}"