diff --git a/.linthtmlrc.json b/.linthtmlrc.json
index 9efa3e937..477c99b1b 100644
--- a/.linthtmlrc.json
+++ b/.linthtmlrc.json
@@ -12,8 +12,8 @@
   "attr-quote-style": "double",
   "attr-req-value": true,
   "class-no-dup": true,
-  "doctype-first": false,
-  "doctype-html5": false,
+  "doctype-first": true,
+  "doctype-html5": true,
   "fig-req-figcaption": true,
   "head-req-title": true,
   "html-req-lang": true,
@@ -26,7 +26,16 @@
   "indent-width-cont": true,
   "input-radio-req-name": true,
   "spec-char-escape": true,
-  "tag-bans": ["b", "i", "u", "center", "style", "marquee", "font", "s"],
+  "tag-bans": [
+    "b",
+    "i",
+    "u",
+    "center",
+    "style",
+    "marquee",
+    "font",
+    "s"
+  ],
   "tag-name-lowercase": true,
   "tag-name-match": true,
   "tag-self-close": false,