diff --git a/server/src/scripts/compute-replies-count.js b/server/src/scripts/compute-replies-count.js
index c8de31621..7dca9f179 100644
--- a/server/src/scripts/compute-replies-count.js
+++ b/server/src/scripts/compute-replies-count.js
@@ -1,29 +1,50 @@
 // @flow
 
 import { messageSpecs } from 'lib/shared/messages/message-specs';
 import { messageTypes } from 'lib/types/message-types';
 import { threadTypes } from 'lib/types/thread-types';
+import { updateTypes } from 'lib/types/update-types';
 
+import { createUpdates } from '../creators/update-creator';
 import { dbQuery, SQL } from '../database/database';
 import { main } from './utils';
 
 async function computeRepliesCount() {
   const includedMessageTypes = Object.keys(messageTypes)
     .map((key) => messageTypes[key])
     .filter((type) => messageSpecs[type].includedInRepliesCount);
 
-  const query = SQL`
+  const sidebarMembersQuery = SQL`
+    SELECT t.id AS threadID, m.user AS userID
+    FROM threads t
+    INNER JOIN memberships m ON t.id = m.thread
+    WHERE t.type = ${threadTypes.SIDEBAR}
+      AND m.role >= 0
+  `;
+  const readCountUpdate = SQL`
     UPDATE threads t
     INNER JOIN (
       SELECT thread AS threadID, COUNT(*) AS count
       FROM messages
       WHERE type IN (${includedMessageTypes})
       GROUP BY thread
     ) c ON c.threadID = t.id
     SET t.replies_count = c.count 
     WHERE t.type = ${threadTypes.SIDEBAR}
   `;
-  await dbQuery(query);
+  const [[sidebarMembers]] = await Promise.all([
+    dbQuery(sidebarMembersQuery),
+    dbQuery(readCountUpdate),
+  ]);
+
+  const time = Date.now();
+  const updates = sidebarMembers.map(({ threadID, userID }) => ({
+    userID,
+    time,
+    threadID,
+    type: updateTypes.UPDATE_THREAD,
+  }));
+  await createUpdates(updates);
 }
 
 main([computeRepliesCount]);