diff --git a/CHANGELOG.md b/CHANGELOG.md
index b175425..0eb4f39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,4 +13,4 @@ All notable changes to Browseroute are documented here (Keep a Changelog style).
 - App icon: charcoal squircle with a routing Y (About, Finder, README).
 
 - Developer ID-signed, notarized GitHub releases (same methodology as yap and TickerBar) and a Homebrew cask.
-- Sparkle EdDSA key baked in; Check for Updates is live on Developer ID-signed GitHub builds (ad-hoc and Homebrew stay off).
+- Sparkle EdDSA key baked in; Check for Updates is live on Developer ID-signed GitHub builds (ad-hoc and Homebrew stay off). The cert check runs after launch and does not hash sealed resources.
diff --git a/Sources/Browseroute/AppDelegate.swift b/Sources/Browseroute/AppDelegate.swift
index d6cd211..3d43e2b 100644
--- a/Sources/Browseroute/AppDelegate.swift
+++ b/Sources/Browseroute/AppDelegate.swift
@@ -5,14 +5,18 @@ import os
 @MainActor
 final class AppDelegate: NSObject, NSApplicationDelegate {
     private var statusController: StatusItemController?
-    private let updater: any UpdaterProviding = makeUpdater()
 
     func applicationDidFinishLaunching(_: Notification) {
         NSApp.setActivationPolicy(.accessory)
-        AppServices.updater = updater
         AppNotify.requestAuthorization()
         statusController = StatusItemController()
-        updater.start()
+        // Sparkle (and the Developer ID check) after this turn so a cold-start
+        // URL open is already routed.
+        Task { @MainActor in
+            let updater = makeUpdater()
+            AppServices.updater = updater
+            updater.start()
+        }
     }
 
     func application(_: NSApplication, open urls: [URL]) {
diff --git a/Sources/Browseroute/Updater.swift b/Sources/Browseroute/Updater.swift
index 9c4a3c2..ff63c4f 100644
--- a/Sources/Browseroute/Updater.swift
+++ b/Sources/Browseroute/Updater.swift
@@ -58,7 +58,9 @@ func makeUpdater() -> any UpdaterProviding {
         }
 
         /// Team 92X3ACDPD2 Developer ID Application. Ad-hoc, Apple Development,
-        /// and other-team signatures do not match.
+        /// and other-team signatures do not match. Skip sealed-resource hashing:
+        /// the requirement still evaluates the cert chain, and a cold-start URL
+        /// open should not wait on Sparkle.framework's CodeResources.
         static let developerIDRequirement =
             "anchor apple generic and certificate 1[field.1.2.840.113635.100.6.2.6] exists and "
                 + "certificate leaf[field.1.2.840.113635.100.6.1.13] exists and "
@@ -76,7 +78,11 @@ func makeUpdater() -> any UpdaterProviding {
                 &requirement,
             )
             guard parsed == errSecSuccess, let requirement else { return false }
-            return SecStaticCodeCheckValidity(staticCode, [], requirement) == errSecSuccess
+            return SecStaticCodeCheckValidity(
+                staticCode,
+                SecCSFlags(rawValue: kSecCSDoNotValidateResources),
+                requirement,
+            ) == errSecSuccess
         }
 
         override init() {