diff --git a/openapi-def.yaml b/openapi-def.yaml
index 6ecdea9..784530a 100644
--- a/openapi-def.yaml
+++ b/openapi-def.yaml
@@ -27,6 +27,17 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/TokenResponse'
+        403:
+          description: Invalid username or password
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ApiError'
+              example:
+                  id: auth.invalid_credentials
+                  message: string
+        422:
+          $ref: '#/components/responses/InvalidBody'
         default:
           $ref: '#/components/responses/Default'
   /api/register: