diff --git a/pymilvus/client/grpc_handler.py b/pymilvus/client/grpc_handler.py
index 9f143ef20..81d324a1c 100644
--- a/pymilvus/client/grpc_handler.py
+++ b/pymilvus/client/grpc_handler.py
@@ -1868,8 +1868,8 @@ def grant_privilege_v2(
         self,
         role_name: str,
         privilege: str,
+        collection_name: str,
         db_name: Optional[str] = None,
-        collection_name: Optional[str] = None,
         timeout: Optional[float] = None,
         **kwargs,
     ):
@@ -1888,8 +1888,8 @@ def revoke_privilege_v2(
         self,
         role_name: str,
         privilege: str,
+        collection_name: str,
         db_name: Optional[str] = None,
-        collection_name: Optional[str] = None,
         timeout: Optional[float] = None,
         **kwargs,
     ):
diff --git a/pymilvus/client/prepare.py b/pymilvus/client/prepare.py
index ef99ab213..942f30a26 100644
--- a/pymilvus/client/prepare.py
+++ b/pymilvus/client/prepare.py
@@ -1337,12 +1337,11 @@ def operate_privilege_v2_request(
         check_pass_param(
             role_name=role_name,
             privilege=privilege,
+            collection_name=collection_name,
             operate_privilege_type=operate_privilege_type,
         )
         if db_name:
             check_pass_param(db_name=db_name)
-        if collection_name:
-            check_pass_param(collection_name=collection_name)
         return milvus_types.OperatePrivilegeV2Request(
             role=milvus_types.RoleEntity(name=role_name),
             grantor=milvus_types.GrantorEntity(
diff --git a/pymilvus/milvus_client/milvus_client.py b/pymilvus/milvus_client/milvus_client.py
index c05a519a4..4f090fe17 100644
--- a/pymilvus/milvus_client/milvus_client.py
+++ b/pymilvus/milvus_client/milvus_client.py
@@ -1008,8 +1008,8 @@ def grant_privilege_v2(
         self,
         role_name: str,
         privilege: str,
+        collection_name: str,
         db_name: Optional[str] = None,
-        collection_name: Optional[str] = None,
         timeout: Optional[float] = None,
         **kwargs,
     ):
@@ -1017,8 +1017,8 @@ def grant_privilege_v2(
         conn.grant_privilege_v2(
             role_name,
             privilege,
+            collection_name,
             db_name=db_name,
-            collection_name=collection_name,
             timeout=timeout,
             **kwargs,
         )
@@ -1027,8 +1027,8 @@ def revoke_privilege_v2(
         self,
         role_name: str,
         privilege: str,
+        collection_name: str,
         db_name: Optional[str] = None,
-        collection_name: Optional[str] = None,
         timeout: Optional[float] = None,
         **kwargs,
     ):
@@ -1036,8 +1036,8 @@ def revoke_privilege_v2(
         conn.revoke_privilege_v2(
             role_name,
             privilege,
+            collection_name,
             db_name=db_name,
-            collection_name=collection_name,
             timeout=timeout,
             **kwargs,
         )
diff --git a/pymilvus/orm/role.py b/pymilvus/orm/role.py
index 313231ad4..21e1b935f 100644
--- a/pymilvus/orm/role.py
+++ b/pymilvus/orm/role.py
@@ -178,48 +178,50 @@ def revoke(self, object: str, object_name: str, privilege: str, db_name: str = "
             self._name, object, object_name, privilege, db_name
         )
 
-    def grant_v2(
-        self, privilege: str, db_name: Optional[str] = None, collection_name: Optional[str] = None
-    ):
+    def grant_v2(self, privilege: str, collection_name: str, db_name: Optional[str] = None):
         """Grant a privilege for the role
             :param privilege: privilege name.
             :type  privilege: str
-            :param db_name: db name. Optional
-            :type  db_name: str
-            :param collection_name: collection name. Optional
+            :param collection_name: collection name.
             :type  collection_name: str
+            :param db_name: db name. Optional. If None, use the default db.
+            :type  db_name: str
 
         :example:
             >>> from pymilvus import connections
             >>> from pymilvus.orm.role import Role
             >>> connections.connect()
             >>> role = Role(role_name)
-            >>> role.grant_v2("Insert", db_name, collection_name)
+            >>> role.grant_v2("Insert", collection_name, db_name=db_name)
         """
         return self._get_connection().grant_privilege_v2(
-            self._name, privilege, db_name=db_name, collection_name=collection_name
+            self._name,
+            privilege,
+            collection_name,
+            db_name=db_name,
         )
 
-    def revoke_v2(
-        self, privilege: str, db_name: Optional[str] = None, collection_name: Optional[str] = None
-    ):
+    def revoke_v2(self, privilege: str, collection_name: str, db_name: Optional[str] = None):
         """Revoke a privilege for the role
             :param privilege: privilege name.
             :type  privilege: str
-            :param db_name: db name. Optional
-            :type  db_name: str
-            :param collection_name: collection name. Optional
+            :param collection_name: collection name.
             :type  collection_name: str
+            :param db_name: db name. Optional. If None, use the default db.
+            :type  db_name: str
 
         :example:
             >>> from pymilvus import connections
             >>> from pymilvus.orm.role import Role
             >>> connections.connect()
             >>> role = Role(role_name)
-            >>> role.revoke_v2("Insert", db_name, collection_name)
+            >>> role.revoke_v2("Insert", collection_name, db_name=db_name)
         """
         return self._get_connection().revoke_privilege_v2(
-            self._name, privilege, db_name=db_name, collection_name=collection_name
+            self._name,
+            privilege,
+            collection_name,
+            db_name=db_name,
         )
 
     def list_grant(self, object: str, object_name: str, db_name: str = ""):
diff --git a/pymilvus/orm/utility.py b/pymilvus/orm/utility.py
index 7844dbb66..e94866156 100644
--- a/pymilvus/orm/utility.py
+++ b/pymilvus/orm/utility.py
@@ -774,7 +774,7 @@ def list_aliases(collection_name: str, timeout: Optional[float] = None, using: s
         ['tom']
     """
     conn = _get_connection(using)
-    resp = conn.describe_collection(collection_name, timeout=timeout)
+    resp = conn.list_aliases(collection_name, timeout=timeout)
     return resp["aliases"]