diff --git a/package.json b/package.json
index 8688788..c4dd755 100644
--- a/package.json
+++ b/package.json
@@ -82,12 +82,12 @@
     "globals": "^17.0.0",
     "lint-staged": "^16.0.0",
     "mdast-util-from-markdown": "^2.0.2",
-    "mdn-data": "^2.27.0",
+    "mdn-data": "^2.27.1",
     "mocha": "^11.0.0",
     "prettier": "3.8.1",
     "tailwind-csstree": "^0.1.0",
     "typescript": "^5.9.2",
-    "web-features": "^3.15.0",
+    "web-features": "^3.16.0",
     "yorkie": "^2.0.0"
   },
   "engines": {
diff --git a/src/data/baseline-data.js b/src/data/baseline-data.js
index 2a81ec6..5acab3b 100644
--- a/src/data/baseline-data.js
+++ b/src/data/baseline-data.js
@@ -746,7 +746,7 @@ export const selectors = new Map([
 	["nth-of-type", "10:2015"],
 	["only-of-type", "10:2015"],
 	["open", "0:"],
-	["first", "5:2023"],
+	["first", "10:2023"],
 	["left", "0:"],
 	["right", "0:"],
 	["picture-in-picture", "0:"],