diff --git a/src/createRoom.ts b/src/createRoom.ts
index 955e3a5707..66177d812b 100644
--- a/src/createRoom.ts
+++ b/src/createRoom.ts
@@ -132,6 +132,8 @@ export default async function createRoom(opts: IOpts): Promise<string | null> {
                 events: {
                     // Allow all users to send video member updates
                     [VIDEO_CHANNEL_MEMBER]: 0,
+                    // Make widgets immutable, even to admins
+                    "im.vector.modular.widgets": 200,
                     // Annoyingly, we have to reiterate all the defaults here
                     [EventType.RoomName]: 50,
                     [EventType.RoomAvatar]: 50,
@@ -142,6 +144,10 @@ export default async function createRoom(opts: IOpts): Promise<string | null> {
                     [EventType.RoomServerAcl]: 100,
                     [EventType.RoomEncryption]: 100,
                 },
+                users: {
+                    // Temporarily give ourselves the power to set up a widget
+                    [client.getUserId()]: 200,
+                },
             };
         }
     }
@@ -264,6 +270,11 @@ export default async function createRoom(opts: IOpts): Promise<string | null> {
         if (opts.roomType === RoomType.ElementVideo) {
             // Set up video rooms with a Jitsi widget
             await addVideoChannel(roomId, createOpts.name);
+
+            // Reset our power level back to admin so that the widget becomes immutable
+            const room = client.getRoom(roomId);
+            const plEvent = room?.currentState.getStateEvents(EventType.RoomPowerLevels, "");
+            await client.setPowerLevel(roomId, client.getUserId(), 100, plEvent);
         }
     }).then(function() {
         // NB createRoom doesn't block on the client seeing the echo that the
diff --git a/test/createRoom-test.ts b/test/createRoom-test.ts
index b10de07e6a..5143db0d70 100644
--- a/test/createRoom-test.ts
+++ b/test/createRoom-test.ts
@@ -37,20 +37,34 @@ describe("createRoom", () => {
         setupAsyncStoreWithClient(WidgetStore.instance, client);
         jest.spyOn(WidgetUtils, "waitForRoomWidget").mockResolvedValue();
 
+        const userId = client.getUserId();
         const roomId = await createRoom({ roomType: RoomType.ElementVideo });
+
         const [[{
             power_level_content_override: {
-                events: { [VIDEO_CHANNEL_MEMBER]: videoMemberPower },
+                users: {
+                    [userId]: userPower,
+                },
+                events: {
+                    "im.vector.modular.widgets": widgetPower,
+                    [VIDEO_CHANNEL_MEMBER]: videoMemberPower,
+                },
             },
         }]] = mocked(client.createRoom).mock.calls as any; // no good type
         const [[widgetRoomId, widgetStateKey]] = mocked(client.sendStateEvent).mock.calls;
 
-        // We should have set up the Jitsi widget
+        // We should have had enough power to be able to set up the Jitsi widget
+        expect(userPower).toBeGreaterThanOrEqual(widgetPower);
+        // and should have actually set it up
         expect(widgetRoomId).toEqual(roomId);
         expect(widgetStateKey).toEqual("im.vector.modular.widgets");
 
         // All members should be able to update their connected devices
         expect(videoMemberPower).toEqual(0);
+        // Jitsi widget should be immutable for admins
+        expect(widgetPower).toBeGreaterThan(100);
+        // and we should have been reset back to admin
+        expect(client.setPowerLevel).toHaveBeenCalledWith(roomId, userId, 100, undefined);
     });
 });