diff --git a/apps/pr-deploy-site/.eslintrc.json b/apps/pr-deploy-site/.eslintrc.json
deleted file mode 100644
index 75b0d9e79f26dc..00000000000000
--- a/apps/pr-deploy-site/.eslintrc.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "extends": ["plugin:@fluentui/eslint-plugin/node"],
-  "root": true,
-  "overrides": [
-    {
-      // pr-deploy-site.js is run without transpiling in all browsers, which means it must use
-      // IE 11-compatible syntax as long as we still support IE 11.
-      "files": ["pr-deploy-site.js"],
-      "plugins": ["es"],
-      "extends": ["plugin:es/restrict-to-es2015", "plugin:@microsoft/eslint-plugin-sdl/required"],
-      "rules": {
-        // turn off conflicting or unwanted rules from normal set
-        "curly": "off",
-        "no-var": "off",
-        "vars-on-top": "off",
-        "prefer-arrow-callback": "off",
-        "no-restricted-globals": "off"
-      }
-    }
-  ]
-}
diff --git a/apps/pr-deploy-site/eslint.config.js b/apps/pr-deploy-site/eslint.config.js
new file mode 100644
index 00000000000000..b5f3fe55818431
--- /dev/null
+++ b/apps/pr-deploy-site/eslint.config.js
@@ -0,0 +1,29 @@
+const js = require('@eslint/js');
+const sdl = require('@microsoft/eslint-plugin-sdl');
+const es = require('eslint-plugin-es');
+const { FlatCompat } = require('@eslint/eslintrc');
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all,
+});
+
+module.exports = [
+  ...compat.extends('plugin:@fluentui/eslint-plugin/node'),
+  ...sdl.configs.recommended,
+  {
+    files: ['**/pr-deploy-site.js'],
+    plugins: {
+      es,
+    },
+
+    rules: {
+      curly: 'off',
+      'no-var': 'off',
+      'vars-on-top': 'off',
+      'prefer-arrow-callback': 'off',
+      'no-restricted-globals': 'off',
+    },
+  },
+];
diff --git a/apps/pr-deploy-site/package.json b/apps/pr-deploy-site/package.json
index 6535c274c036aa..d694f119735d55 100644
--- a/apps/pr-deploy-site/package.json
+++ b/apps/pr-deploy-site/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "clean": "just-scripts clean",
     "generate:site": "just-scripts generate:site",
-    "lint": "ESLINT_USE_FLAT_CONFIG=false eslint --ext .js,.ts --cache .",
+    "lint": "eslint --cache .",
     "type-check": "tsc -p . --noEmit"
   },
   "license": "MIT",