diff --git a/src/Entrust/Traits/EntrustRoleTrait.php b/src/Entrust/Traits/EntrustRoleTrait.php
index 4e39439a..90be0cc0 100644
--- a/src/Entrust/Traits/EntrustRoleTrait.php
+++ b/src/Entrust/Traits/EntrustRoleTrait.php
@@ -174,7 +174,7 @@ public function attachPermission($permission)
             return $this->attachPermissions($permission);
         }
 
-        $this->perms()->attach($permission);
+        $this->perms()->sync($permission, false);
     }
 
     /**
diff --git a/src/Entrust/Traits/EntrustUserTrait.php b/src/Entrust/Traits/EntrustUserTrait.php
index c799bbeb..8eb540f7 100644
--- a/src/Entrust/Traits/EntrustUserTrait.php
+++ b/src/Entrust/Traits/EntrustUserTrait.php
@@ -257,7 +257,7 @@ public function attachRole($role)
             $role = $role['id'];
         }
 
-        $this->roles()->attach($role);
+        $this->roles()->sync($role, false);
     }
 
     /**