diff --git a/api/swagger.yaml b/api/swagger.yaml
index b8b3ea0946554..594c126464d78 100644
--- a/api/swagger.yaml
+++ b/api/swagger.yaml
@@ -8782,12 +8782,20 @@ paths:
         if `tty` was specified as part of creating and starting the exec instance.
       operationId: "ExecResize"
       responses:
-        201:
+        200:
           description: "No error"
+        400:
+          description: "bad parameter"
+          schema:
+            $ref: "#/definitions/ErrorResponse"
         404:
           description: "No such exec instance"
           schema:
             $ref: "#/definitions/ErrorResponse"
+        500:
+          description: "Server error"
+          schema:
+            $ref: "#/definitions/ErrorResponse"
       parameters:
         - name: "id"
           in: "path"