diff --git a/admin/src/composables/height.ts b/admin/src/composables/height.ts
index 7e21e69c7..e6ef1d261 100644
--- a/admin/src/composables/height.ts
+++ b/admin/src/composables/height.ts
@@ -1,16 +1,14 @@
 export function useTableHeight() {
-  const instance = getCurrentInstance();
+  const { proxy } = getCurrentInstance() as any;
 
-  if (!instance) {
+  if (!proxy) {
     return;
   }
 
-  const ins = instance as any;
-
   const containerHeaderRef =
-    ins.ctx.$el.getElementsByClassName('container-header')[0];
+    proxy.$el.getElementsByClassName('container-header')[0];
   const containerMainRef =
-    ins.ctx.$el.getElementsByClassName('container-main')[0];
+    proxy.$el.getElementsByClassName('container-main')[0];
 
   if (!containerMainRef) {
     return;