diff --git a/src/services/group-sync.ts b/src/services/group-sync.ts
index 0f00de0..bfe4b11 100644
--- a/src/services/group-sync.ts
+++ b/src/services/group-sync.ts
@@ -67,8 +67,12 @@ export class GroupSyncService {
     let updated = 0;
 
     const transactionResult = db.transaction(() => {
-      // First mark all groups as inactive
-      const inactiveResult = db.prepare('UPDATE groups SET active = FALSE').run();
+      // First mark all groups as inactive and update verification timestamp
+      const inactiveResult = db.prepare(`
+        UPDATE groups 
+        SET active = FALSE, 
+            last_verified = CURRENT_TIMESTAMP
+      `).run();
       console.log('Marked groups inactive:', inactiveResult);
 
       for (const group of groups) {