diff --git a/packages/web-runtime/src/container/bootstrap.ts b/packages/web-runtime/src/container/bootstrap.ts
index 74e55681a2..d766fe9775 100644
--- a/packages/web-runtime/src/container/bootstrap.ts
+++ b/packages/web-runtime/src/container/bootstrap.ts
@@ -80,6 +80,8 @@ import {
 } from './sse'
 import { loadAppTranslations } from '../helpers/language'
 import { urlJoin } from '@opencloud-eu/web-client'
+import { sha256 } from '@noble/hashes/sha2.js'
+import { bytesToHex } from '@noble/hashes/utils.js'
 
 const getEmbedConfigFromQuery = (
   doesEmbedEnabledOptionExists: boolean
@@ -705,12 +707,15 @@ export const announceUpdates = async ({
   }
 
   try {
+    const encoder = new TextEncoder()
+    const sha256ServerUrl = sha256(encoder.encode(configStore.serverUrl))
+
     updatesStore.setIsLoading(true)
     const { data }: { data: Updates } = await clientService.httpUnAuthenticated.get(
       'https://update.opencloud.eu/server.json',
       {
         params: {
-          server: configStore.serverUrl,
+          server: bytesToHex(sha256ServerUrl),
           edition: capabilityStore.status.edition || 'rolling',
           version: capabilityStore.status.productversion
         }
diff --git a/packages/web-runtime/tests/unit/container/bootstrap.spec.ts b/packages/web-runtime/tests/unit/container/bootstrap.spec.ts
index 20bc9416c5..9b085a6dd0 100644
--- a/packages/web-runtime/tests/unit/container/bootstrap.spec.ts
+++ b/packages/web-runtime/tests/unit/container/bootstrap.spec.ts
@@ -1,15 +1,23 @@
-import { mock } from 'vitest-mock-extended'
+import { mock, mockDeep } from 'vitest-mock-extended'
 import { createApp, defineComponent, App } from 'vue'
-import { useAppsStore, useConfigStore } from '@opencloud-eu/web-pkg'
+import {
+  CapabilityStore,
+  ClientService,
+  ConfigStore,
+  useAppsStore,
+  useConfigStore,
+  useUpdatesStore
+} from '@opencloud-eu/web-pkg'
 import {
   initializeApplications,
   announceApplicationsReady,
   announceCustomScripts,
   announceCustomStyles,
-  announceConfiguration
+  announceConfiguration,
+  announceUpdates
 } from '../../../src/container/bootstrap'
 import { buildApplication, loadApplication } from '../../../src/container/application'
-import { createTestingPinia } from '@opencloud-eu/web-test-helpers'
+import { createTestingPinia, mockAxiosResolve } from '@opencloud-eu/web-test-helpers'
 
 vi.mock('../../../src/container/application')
 
@@ -217,3 +225,46 @@ describe('announceConfiguration', () => {
     expect(configStore.options.embed.enabled).toStrictEqual(false)
   })
 })
+
+describe('announceUpdates', () => {
+  it('does not contact the update server, if capability is turned off', async () => {
+    const configStore = mockDeep<ConfigStore>({ serverUrl: 'https://demo.opencloud.eu' })
+    const capabilityStore = mockDeep<CapabilityStore>({
+      capabilities: {
+        core: { 'check-for-updates': false }
+      },
+      status: { productversion: '3.5.0', edition: 'rolling' }
+    })
+    const updatesStore = useUpdatesStore()
+    const clientService = mockDeep<ClientService>()
+
+    clientService.httpAuthenticated.get.mockResolvedValue(mockAxiosResolve({}))
+    await announceUpdates({ clientService, updatesStore, configStore, capabilityStore })
+    expect(clientService.httpUnAuthenticated.get).not.toHaveBeenCalled()
+  })
+
+  it('sends the correct params to the update server', async () => {
+    const configStore = mockDeep<ConfigStore>({ serverUrl: 'https://demo.opencloud.eu' })
+    const capabilityStore = mockDeep<CapabilityStore>({
+      capabilities: {
+        core: { 'check-for-updates': true }
+      },
+      status: { productversion: '3.5.0', edition: 'rolling' }
+    })
+    const updatesStore = useUpdatesStore()
+    const clientService = mockDeep<ClientService>()
+
+    clientService.httpAuthenticated.get.mockResolvedValue(mockAxiosResolve({}))
+    await announceUpdates({ clientService, updatesStore, configStore, capabilityStore })
+    expect(clientService.httpUnAuthenticated.get).toHaveBeenCalledWith(
+      'https://update.opencloud.eu/server.json',
+      {
+        params: {
+          edition: 'rolling',
+          server: 'feb937bb3019600cd682a7fc66d17a37540d9b3060ffa415373f2ad81f9f3b3a',
+          version: '3.5.0'
+        }
+      }
+    )
+  })
+})