diff --git a/web_app/src/components/SidePanel/DiffusionOptions.tsx b/web_app/src/components/SidePanel/DiffusionOptions.tsx
index e984497..461f6e1 100644
--- a/web_app/src/components/SidePanel/DiffusionOptions.tsx
+++ b/web_app/src/components/SidePanel/DiffusionOptions.tsx
@@ -23,7 +23,7 @@ import {
   POWERPAINT,
 } from "@/lib/const"
 import { RowContainer, LabelTitle } from "./LabelTitle"
-import { Minus, Plus, Upload } from "lucide-react"
+import { Upload } from "lucide-react"
 import { useClickAway } from "react-use"
 
 const ExtenderButton = ({
diff --git a/web_app/src/lib/api.ts b/web_app/src/lib/api.ts
index 54e577e..eaa561e 100644
--- a/web_app/src/lib/api.ts
+++ b/web_app/src/lib/api.ts
@@ -204,7 +204,7 @@ export async function getSamplers(): Promise<string[]> {
 
 export async function postAdjustMask(
   mask: File | Blob,
-  operate: "expand" | "shrink",
+  operate: "expand" | "shrink" | "reverse",
   kernel_size: number
 ) {
   const maskBase64 = await convertToBase64(mask)