diff --git a/packages/service-worker/src/module.ts b/packages/service-worker/src/module.ts
index 85eef4f67c..d707a58e33 100644
--- a/packages/service-worker/src/module.ts
+++ b/packages/service-worker/src/module.ts
@@ -7,7 +7,7 @@
  */
 
 import {isPlatformBrowser} from '@angular/common';
-import {APP_INITIALIZER, ApplicationRef, InjectionToken, Injector, ModuleWithProviders, NgModule, PLATFORM_ID} from '@angular/core';
+import {APP_INITIALIZER, ApplicationRef, InjectionToken, Injector, ModuleWithProviders, NgModule, NgZone, PLATFORM_ID} from '@angular/core';
 import {Observable, merge, of } from 'rxjs';
 import {delay, filter, take} from 'rxjs/operators';
 
@@ -122,10 +122,15 @@ export function ngswAppInitializer(
     }
 
     // Don't return anything to avoid blocking the application until the SW is registered.
+    // Also, run outside the Angular zone to avoid preventing the app from stabilizing (especially
+    // given that some registration strategies wait for the app to stabilize).
     // Catch and log the error if SW registration fails to avoid uncaught rejection warning.
-    readyToRegister$.pipe(take(1)).subscribe(
-        () => navigator.serviceWorker.register(script, {scope: options.scope})
-                  .catch(err => console.error('Service worker registration failed with:', err)));
+    const ngZone = injector.get(NgZone);
+    ngZone.runOutsideAngular(
+        () => readyToRegister$.pipe(take(1)).subscribe(
+            () =>
+                navigator.serviceWorker.register(script, {scope: options.scope})
+                    .catch(err => console.error('Service worker registration failed with:', err))));
   };
   return initializer;
 }