diff --git a/app/Jobs/Auth/UpdateUser.php b/app/Jobs/Auth/UpdateUser.php
index 56cc7c3d5..1e2a044c6 100644
--- a/app/Jobs/Auth/UpdateUser.php
+++ b/app/Jobs/Auth/UpdateUser.php
@@ -87,5 +87,29 @@ class UpdateUser extends Job implements ShouldUpdate
 
             throw new \Exception($message);
         }
+
+        // Can't unassigned company, The company must be assigned at least one user.
+        $companies = $this->request->get('companies');
+        $user_companies = $this->model->companies()->pluck('id')->toArray();
+
+        $company_diff = array_diff($user_companies, $companies);
+
+        if ($company_diff) {
+            $errors = [];
+
+            foreach ($company_diff as $company_id) {
+                $company = Company::withCount('users')->find($company_id);
+
+                if ($company->users_count < 2) {
+                    $errors[] = trans('auth.error.unassigned', ['company' => $company->name]);
+                }
+            }
+
+            if ($errors) {
+                $message = implode('\n', $errors);
+
+                throw new \Exception($message);
+            }
+        }
     }
 }