diff --git a/package.json b/package.json
index 620658a..0c4b32f 100644
--- a/package.json
+++ b/package.json
@@ -41,18 +41,18 @@
     "@types/jest": "^29.5.12",
     "cheminfo-build": "^1.2.0",
     "eslint": "^8.57.0",
-    "eslint-config-cheminfo-typescript": "^12.2.0",
+    "eslint-config-cheminfo-typescript": "^12.4.0",
     "he": "^1.2.0",
     "iobuffer": "^5.3.2",
     "jest": "^29.7.0",
     "pako": "^2.1.0",
     "prettier": "^3.2.5",
-    "rimraf": "^5.0.5",
+    "rimraf": "^5.0.7",
     "ts-jest": "^29.1.2",
-    "typescript": "^5.3.3",
+    "typescript": "^5.4.5",
     "uint8-base64": "^0.1.1"
   },
   "dependencies": {
-    "dynamic-typing": "^1.0.0"
+    "dynamic-typing": "^1.0.1"
   }
 }
diff --git a/src/.npmignore b/src/.npmignore
index d1c932d..e75adf4 100644
--- a/src/.npmignore
+++ b/src/.npmignore
@@ -1,3 +1,2 @@
 __tests__
-.npmignore
-.DS_Store
\ No newline at end of file
+.npmignore
\ No newline at end of file
diff --git a/src/XMLNode.ts b/src/XMLNode.ts
index 1f5308c..1ddd5b9 100644
--- a/src/XMLNode.ts
+++ b/src/XMLNode.ts
@@ -1,19 +1,21 @@
+export type XMLNodeValue = string | Uint8Array | number | boolean;
+
 export class XMLNode {
   public tagName: string;
   public parent?: XMLNode;
   public children: Record<string, XMLNode[]>;
   public attributes?: Record<string, XMLNode | boolean>;
-  public value?: string | Uint8Array;
+  public value?: XMLNodeValue;
   public startIndex: number;
   public constructor(
     tagName: string,
     parent?: XMLNode,
-    value?: Uint8Array | string,
+    value?: Uint8Array | string | undefined | number,
   ) {
     this.tagName = tagName;
     this.parent = parent;
-    this.children = Object.create({}); //child tags
-    this.attributes = Object.create({}); //attributes map
+    this.children = Object.create(null); //child tags
+    this.attributes = Object.create(null); //attributes map
     this.value = value; //text only
     this.startIndex = -1;
   }
diff --git a/src/traversable/utils/concat.ts b/src/traversable/utils/concat.ts
index 4b85f27..60d1d29 100644
--- a/src/traversable/utils/concat.ts
+++ b/src/traversable/utils/concat.ts
@@ -1,7 +1,6 @@
-export function concat(
-  a?: string | ArrayLike<number> | undefined,
-  b?: string | ArrayLike<number>,
-) {
+import { XMLNodeValue } from '../../XMLNode';
+
+export function concat(a?: XMLNodeValue, b?: XMLNodeValue) {
   if (a === undefined) {
     a = typeof b === 'string' ? '' : new Uint8Array(0);
   }
diff --git a/src/traversableToJSON.ts b/src/traversableToJSON.ts
index 20e8ac9..df61629 100644
--- a/src/traversableToJSON.ts
+++ b/src/traversableToJSON.ts
@@ -1,11 +1,9 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
-import { XMLNode } from './XMLNode';
+import { parseString } from 'dynamic-typing';
+
+import { XMLNode, XMLNodeValue } from './XMLNode';
 import { ParseOptions } from './traversable/defaultOptions';
 import { isTagNameInArrayMode, merge, isEmptyObject } from './util';
 
-// eslint-disable-next-line @typescript-eslint/no-var-requires
-const { parseString } = require('dynamic-typing');
-
 /**
  *
  * @param {*} node
@@ -17,7 +15,7 @@ export function traversableToJSON(
   node: XMLNode,
   options: ParseOptions,
   parentTagName?: string,
-): string | Uint8Array | Record<string, string | Uint8Array> {
+): XMLNodeValue | Record<string, XMLNodeValue> {
   const {
     dynamicTypingNodeValue,
     tagValueProcessor,
@@ -43,7 +41,12 @@ export function traversableToJSON(
   }
 
   // otherwise create a textnode if node has some text
-  if (node.value !== undefined && node.value.length !== 0) {
+  if (
+    node.value !== undefined &&
+    (typeof node.value === 'number' ||
+      typeof node.value === 'boolean' ||
+      node.value.length !== 0)
+  ) {
     const asArray = isTagNameInArrayMode(
       node.tagName,
       arrayMode,
diff --git a/tsconfig.json b/tsconfig.json
index a3c234e..18aa530 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -4,6 +4,7 @@
     "esModuleInterop": true,
     "moduleResolution": "node",
     "outDir": "lib",
+    "skipLibCheck": true,
     "sourceMap": true,
     "strict": true,
     "target": "es2022"