diff --git a/package-lock.json b/package-lock.json
index f022317d..5a974786 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,7 +22,7 @@
       "devDependencies": {
         "@biomejs/biome": "^2.6.4",
         "@changesets/cli": "^3.0.3",
-        "@types/flat": "^5.0.5",
+        "@types/flat": "^6.0.1",
         "@types/js-yaml": "^4.0.9",
         "@types/markup-js": "^1.5.0",
         "@types/node": "^24.19.2",
@@ -894,11 +894,15 @@
       "license": "MIT"
     },
     "node_modules/@types/flat": {
-      "version": "5.0.5",
-      "resolved": "https://registry.npmjs.org/@types/flat/-/flat-5.0.5.tgz",
-      "integrity": "sha512-nPLljZQKSnac53KDUDzuzdRfGI0TDb5qPrb+SrQyN3MtdQrOnGsKniHN1iYZsJEBIVQve94Y6gNz22sgISZq+Q==",
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/@types/flat/-/flat-6.0.1.tgz",
+      "integrity": "sha512-gbCQ9uq4joBt2StDLinB8u8kEo2RkVf1MqCGJYqVXrZwfBMy86i4RzW7hH6Hp5c1ymB1ZrA+SJx2NyQuGqtEqg==",
+      "deprecated": "This is a stub types definition. flat provides its own type definitions, so you do not need this installed.",
       "dev": true,
-      "license": "MIT"
+      "license": "MIT",
+      "dependencies": {
+        "flat": "*"
+      }
     },
     "node_modules/@types/js-yaml": {
       "version": "4.0.9",
diff --git a/package.json b/package.json
index 60fa613a..afd16c1d 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
   "devDependencies": {
     "@biomejs/biome": "^2.6.4",
     "@changesets/cli": "^3.0.3",
-    "@types/flat": "^5.0.5",
+    "@types/flat": "^6.0.1",
     "@types/js-yaml": "^4.0.9",
     "@types/markup-js": "^1.5.0",
     "@types/node": "^24.19.2",