diff --git a/lib/actions/user-actions.js b/lib/actions/user-actions.js
--- a/lib/actions/user-actions.js
+++ b/lib/actions/user-actions.js
@@ -26,6 +26,9 @@
   getPrekeyValueFromBlob,
 } from '../shared/crypto-utils.js';
 import { fetchLatestDeviceList } from '../shared/device-list-utils.js';
+import type { OutboundDMOperationSpecification } from '../shared/dm-ops/dm-op-utils';
+import { dmOperationSpecificationTypes } from '../shared/dm-ops/dm-op-utils.js';
+import { useProcessAndSendDMOperation } from '../shared/dm-ops/process-dm-ops.js';
 import { IdentityClientContext } from '../shared/identity-client-context.js';
 import threadWatcher from '../shared/thread-watcher.js';
 import {
@@ -54,6 +57,7 @@
   UpdateUserAvatarRequest,
   UpdateUserAvatarResponse,
 } from '../types/avatar-types.js';
+import type { DMChangeThreadSubscriptionOperation } from '../types/dm-ops';
 import type { RawEntryInfo, CalendarQuery } from '../types/entry-types.js';
 import type {
   UserIdentitiesResponse,
@@ -63,6 +67,7 @@
   RawMessageInfo,
   MessageTruncationStatuses,
 } from '../types/message-types.js';
+import type { ThreadInfo } from '../types/minimally-encoded-thread-permissions-types';
 import type { GetOlmSessionInitializationDataResponse } from '../types/olm-session-types.js';
 import type {
   UserSearchResult,
@@ -73,6 +78,10 @@
   SubscriptionUpdateRequest,
   SubscriptionUpdateResult,
 } from '../types/subscription-types.js';
+import {
+  thickThreadTypes,
+  threadTypeIsThick,
+} from '../types/thread-types-enum.js';
 import type { RawThreadInfos } from '../types/thread-types.js';
 import {
   userActionsP2PMessageTypes,
@@ -1200,10 +1209,52 @@
     };
   };
 
-function useUpdateSubscription(): (
-  input: SubscriptionUpdateRequest,
-) => Promise<SubscriptionUpdateResult> {
-  return useKeyserverCall(updateSubscription);
+function useUpdateSubscription(
+  threadInfo: ThreadInfo,
+): (input: SubscriptionUpdateRequest) => Promise<SubscriptionUpdateResult> {
+  const processAndSendDMOperation = useProcessAndSendDMOperation();
+  const viewerID = useSelector(
+    state => state.currentUserInfo && state.currentUserInfo.id,
+  );
+  const keyserverCall = useKeyserverCall(updateSubscription);
+
+  return React.useCallback(
+    async (input: SubscriptionUpdateRequest) => {
+      if (!threadTypeIsThick(threadInfo.type)) {
+        return await keyserverCall(input);
+      }
+
+      invariant(viewerID, 'viewerID must be set');
+      const subscription = {
+        ...threadInfo.currentUser.subscription,
+        ...input.updatedFields,
+      };
+      const op: DMChangeThreadSubscriptionOperation = {
+        type: 'change_thread_subscription',
+        time: Date.now(),
+        threadID: threadInfo.id,
+        creatorID: viewerID,
+        subscription,
+      };
+
+      const opSpecification: OutboundDMOperationSpecification = {
+        type: dmOperationSpecificationTypes.OUTBOUND,
+        op,
+        recipients: {
+          type: 'all_thread_members',
+          threadID:
+            threadInfo.type === thickThreadTypes.THICK_SIDEBAR &&
+            threadInfo.parentThreadID
+              ? threadInfo.parentThreadID
+              : threadInfo.id,
+        },
+      };
+
+      await processAndSendDMOperation(opSpecification);
+      return { threadID: threadInfo.id, subscription };
+    },
+    [keyserverCall, processAndSendDMOperation, viewerID, threadInfo],
+  );
 }
 
 const setUserSettingsActionTypes = Object.freeze({
diff --git a/lib/shared/dm-ops/change-thread-subscription.js b/lib/shared/dm-ops/change-thread-subscription.js
--- a/lib/shared/dm-ops/change-thread-subscription.js
+++ b/lib/shared/dm-ops/change-thread-subscription.js
@@ -42,10 +42,18 @@
         member => member.id !== creatorID,
       );
       const membersUpdate = [...otherMemberInfos, updatedCreatorMemberInfo];
+      const currentUserUpdate =
+        viewerID === creatorID
+          ? {
+              ...threadInfo.currentUser,
+              subscription,
+            }
+          : threadInfo.currentUser;
 
       const threadInfoUpdate = {
         ...threadInfo,
         members: membersUpdate,
+        currentUser: currentUserUpdate,
         timestamps: {
           ...threadInfo.timestamps,
           members: {
@@ -57,6 +65,7 @@
           },
         },
       };
+
       const updateInfos: Array<ClientUpdateInfo> = [
         {
           type: updateTypes.UPDATE_THREAD,
diff --git a/lib/shared/thread-settings-notifications-utils.js b/lib/shared/thread-settings-notifications-utils.js
--- a/lib/shared/thread-settings-notifications-utils.js
+++ b/lib/shared/thread-settings-notifications-utils.js
@@ -102,7 +102,7 @@
 
   const dispatchActionPromise = useDispatchActionPromise();
 
-  const callUpdateSubscription = useUpdateSubscription();
+  const callUpdateSubscription = useUpdateSubscription(threadInfo);
 
   const updateSubscriptionPromise = React.useCallback(async () => {
     const res = await callUpdateSubscription({