diff --git a/lib/react-utils.js b/lib/react-utils.js
index f03ef46..4e8d51d 100644
--- a/lib/react-utils.js
+++ b/lib/react-utils.js
@@ -1,14 +1,17 @@
+/* eslint-disable regexp/no-useless-range */
+
 // *** REACT BORROWED ***
 
 const ATTRIBUTE_NAME_START_CHAR =
   ':A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD';
 const ATTRIBUTE_NAME_CHAR =
+  // eslint-disable-next-line regexp/prefer-w
   ATTRIBUTE_NAME_START_CHAR + '\\-.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040';
 
 // eslint-disable-next-line no-misleading-character-class
 const VALID_ATTRIBUTE_NAME_REGEX = new RegExp('^[' + ATTRIBUTE_NAME_START_CHAR + '][' + ATTRIBUTE_NAME_CHAR + ']*$');
 
-const VALID_TAG_REGEX = /^[A-Za-z][\w.:-]*$/; // Simplified subset
+const VALID_TAG_REGEX = /^[a-z][\w.:-]*$/i; // Simplified subset
 
 /** @type {Map<string, boolean>} */
 const validatedTagCache = new Map();
diff --git a/package.json b/package.json
index 64ff151..d6fb521 100644
--- a/package.json
+++ b/package.json
@@ -93,27 +93,27 @@
     "@skypack/package-check": "^0.2.2",
     "@types/chai": "^4.3.20",
     "@types/chai-as-promised": "^7.1.8",
-    "@types/mocha": "^10.0.8",
-    "@types/node": "^18.19.54",
+    "@types/mocha": "^10.0.9",
+    "@types/node": "^18.19.59",
     "@types/sinon": "^17.0.3",
     "@types/sinon-chai": "^3.2.12",
-    "@voxpelli/eslint-config": "^21.0.0",
+    "@voxpelli/eslint-config": "^22.0.0",
     "@voxpelli/tsconfig": "^15.0.0",
     "c8": "^10.1.2",
     "chai": "^4.5.0",
     "chai-as-promised": "^7.1.2",
-    "eslint": "^9.11.1",
+    "eslint": "^9.13.0",
     "husky": "^9.1.6",
     "installed-check": "^9.3.0",
-    "knip": "^5.30.6",
+    "knip": "^5.34.0",
     "linemod": "^2.0.1",
     "mocha": "^10.7.3",
     "nodemon": "^3.1.7",
-    "npm-run-all2": "^6.2.3",
+    "npm-run-all2": "^6.2.6",
     "sinon": "^19.0.2",
     "sinon-chai": "^3.7.0",
     "tsd": "^0.31.2",
-    "type-coverage": "^2.29.1",
+    "type-coverage": "^2.29.7",
     "typescript": "~5.6.2",
     "validate-conventional-commit": "^1.0.4"
   }