diff --git a/DysonNetwork.Sphere/Publisher/PublisherController.cs b/DysonNetwork.Sphere/Publisher/PublisherController.cs
index 585e816..ee7ba4e 100644
--- a/DysonNetwork.Sphere/Publisher/PublisherController.cs
+++ b/DysonNetwork.Sphere/Publisher/PublisherController.cs
@@ -938,13 +938,7 @@ public class PublisherController(
         if (publisher is null)
             return NotFound();
 
-        var member = await db.PublisherMembers
-            .Where(m => m.AccountId == accountId)
-            .Where(m => m.PublisherId == publisher.Id)
-            .FirstOrDefaultAsync();
-        if (member is null)
-            return StatusCode(403, "You are not even a member of targeted publisher.");
-        if (member.Role < PublisherMemberRole.Manager)
+        if (!await ps.IsMemberWithRole(publisher.Id, accountId, PublisherMemberRole.Manager))
             return StatusCode(403, "You need at least be manager to enable fediverse for this publisher.");
 
         try
@@ -972,13 +966,7 @@ public class PublisherController(
         if (publisher is null)
             return NotFound();
 
-        var member = await db.PublisherMembers
-            .Where(m => m.AccountId == accountId)
-            .Where(m => m.PublisherId == publisher.Id)
-            .FirstOrDefaultAsync();
-        if (member is null)
-            return StatusCode(403, "You are not even a member of targeted publisher.");
-        if (member.Role < PublisherMemberRole.Manager)
+        if (!await ps.IsMemberWithRole(publisher.Id, accountId, PublisherMemberRole.Manager))
             return StatusCode(403, "You need at least be manager to disable fediverse for this publisher.");
 
         try