diff --git a/lib/asset-css.js b/lib/asset-css.js
index b883226..2b9daca 100644
--- a/lib/asset-css.js
+++ b/lib/asset-css.js
@@ -42,6 +42,7 @@ export default class PodiumAssetCss {
     #hreflang;
     #prefix;
     #title;
+    /** @type {string} */
     #value;
     #media;
     #type;
@@ -53,19 +54,19 @@ export default class PodiumAssetCss {
     /**
      * @constructor
      * @param {object} options
-     * @param {boolean | string | null} [options.crossorigin]
-     * @param {string | null} [options.hreflang=""]
-     * @param {boolean | null} [options.prefix=false]
-     * @param {boolean | null} [options.disabled=false]
-     * @param {string | null} [options.pathname=""]
-     * @param {string | null} [options.title=""]
-     * @param {string | null} [options.media=""]
-     * @param {string | null} [options.type="text/css"]
-     * @param {string | null} [options.rel="stylesheet"]
-     * @param {string | null} [options.as=""]
-     * @param {string | null} [options.value]
-     * @param {string | null} [options.strategy]
-     * @param {string | null} [options.scope]
+     * @param {boolean | string} [options.crossorigin]
+     * @param {string} [options.hreflang=""]
+     * @param {boolean} [options.prefix=false]
+     * @param {boolean} [options.disabled=false]
+     * @param {string} [options.pathname=""]
+     * @param {string} [options.title=""]
+     * @param {string} [options.media=""]
+     * @param {string} [options.type="text/css"]
+     * @param {string} [options.rel="stylesheet"]
+     * @param {string} [options.as=""]
+     * @param {string} [options.value]
+     * @param {string} [options.strategy]
+     * @param {string} [options.scope]
      */
     constructor({
         crossorigin = undefined,
@@ -89,7 +90,7 @@ export default class PodiumAssetCss {
 
         this.#pathname = pathname;
         this.#prefix = prefix;
-        this.#value = value;
+        this.#value = /** @type {string} */ (value);
 
         this.#crossorigin = crossorigin;
         this.#disabled = disabled;
diff --git a/lib/asset-js.js b/lib/asset-js.js
index c0ecc1e..29c95b8 100644
--- a/lib/asset-js.js
+++ b/lib/asset-js.js
@@ -44,6 +44,7 @@ export default class PodiumAssetJs {
     #pathname;
     #nomodule;
     #prefix;
+    /** @type {string} */
     #value;
     #async;
     #defer;
@@ -55,19 +56,19 @@ export default class PodiumAssetJs {
     /**
      * @constructor
      * @param {object} options
-     * @param {string | null} [options.referrerpolicy]
-     * @param {boolean | string | null} [options.crossorigin]
-     * @param {string | null} [options.integrity]
-     * @param {string | null} [options.pathname]
-     * @param {boolean | null} [options.nomodule=false]
-     * @param {boolean | null} [options.prefix=false]
-     * @param {string | null} [options.value]
-     * @param {boolean | null} [options.async=false]
-     * @param {boolean | null} [options.defer=false]
-     * @param {string | null} [options.type="default"]
-     * @param {array} [options.data]
-     * @param {string | null} [options.strategy]
-     * @param {string | null} [options.scope]
+     * @param {string} [options.referrerpolicy]
+     * @param {boolean | string} [options.crossorigin]
+     * @param {string} [options.integrity]
+     * @param {string} [options.pathname]
+     * @param {boolean} [options.nomodule=false]
+     * @param {boolean} [options.prefix=false]
+     * @param {string} [options.value]
+     * @param {boolean} [options.async=false]
+     * @param {boolean} [options.defer=false]
+     * @param {string} [options.type="default"]
+     * @param {Array<{ key: string, value?: unknown }>} [options.data]
+     * @param {string} [options.strategy]
+     * @param {string} [options.scope]
      */
     constructor({
         referrerpolicy = '',
@@ -92,7 +93,7 @@ export default class PodiumAssetJs {
 
         this.#pathname = pathname;
         this.#prefix = prefix;
-        this.#value = value;
+        this.#value = /** @type {string} */ (value);
 
         this.#referrerpolicy = referrerpolicy;
         this.#crossorigin = crossorigin;
@@ -239,10 +240,9 @@ export default class PodiumAssetJs {
             .filter(([key, value]) => value && key !== 'value')
             .flatMap(([key, value]) => {
                 if (key === 'data') {
-                    // @ts-ignore
-                    return value.map(
-                        ({ key, value }) => `data-${key}=${value}`,
-                    );
+                    return /** @type {Array<{ key: string, value?: unknown }>} */ (
+                        value
+                    ).map(({ key, value }) => `data-${key}=${value}`);
                 }
                 return [`${key}=${value}`];
             });
diff --git a/lib/assets.js b/lib/assets.js
index e5953d2..df7ea1a 100644
--- a/lib/assets.js
+++ b/lib/assets.js
@@ -3,8 +3,12 @@ import { EventEmitter } from 'node:events';
 export class Assets extends EventEmitter {
     #expectedAssets = new Set();
     #receivedAssets = new Map();
-    #js;
-    #css;
+
+    /** @type {Array<import('./asset-js.js').JavaScriptAsset | string>} */
+    #js = [];
+
+    /** @type {Array<import('./asset-css.js').CssAsset | string>} */
+    #css = [];
 
     // pointless constructor with super to appease TS which cryptically errors otherwise.
     constructor() {
diff --git a/lib/html-document.js b/lib/html-document.js
index 1e40ce7..06a3e8a 100644
--- a/lib/html-document.js
+++ b/lib/html-document.js
@@ -13,7 +13,7 @@ export const document = (incoming, body = '', head = '') => {
         incoming.view.locale ||
         incoming.context['podium-locale'] ||
         incoming.context.locale ||
-        incoming.params.locale ||
+        incoming.params?.locale ||
         'en-US';
 
     // backwards compatibility for scripts and styles
@@ -28,13 +28,17 @@ export const document = (incoming, body = '', head = '') => {
         <meta charset="${incoming.view.encoding ? incoming.view.encoding : 'utf-8'}">
         <meta name="viewport" content="width=device-width, initial-scale=1">
         <meta http-equiv="X-UA-Compatible" content="IE=Edge">
-        ${styles.map(utils.buildLinkElement).join('\n        ')}
+        ${
+            // @ts-expect-error We filter out strings before this
+            styles.map(utils.buildLinkElement).join('\n        ')
+        }
         ${scripts
             .filter(
                 (script) =>
                     typeof script !== 'string' &&
                     script.strategy === 'beforeInteractive',
             )
+            // @ts-expect-error We filter out strings before this
             .map(utils.buildScriptElement)
             .join('\n        ')}
         <title>${incoming.view.title ? incoming.view.title : ''}</title>
@@ -49,6 +53,7 @@ export const document = (incoming, body = '', head = '') => {
                     script.strategy === 'afterInteractive' ||
                     !script.strategy,
             )
+            // @ts-expect-error We filter out strings before this
             .map(utils.buildScriptElement)
             .join('\n        ')}
         ${scripts
diff --git a/lib/html-utils.js b/lib/html-utils.js
index 0beabca..9d7a475 100644
--- a/lib/html-utils.js
+++ b/lib/html-utils.js
@@ -71,6 +71,7 @@ export const buildScriptAttributes = (obj) => {
  * @returns {object}
  */
 export const buildReactScriptAttributes = (obj) => {
+    /** @type {Record<string, unknown>} */
     const attrs = {};
     for (const { key, value } of buildScriptAttributes(obj)) {
         if (key === 'crossorigin') attrs.crossOrigin = value || '';
@@ -145,6 +146,7 @@ export const buildLinkAttributes = (obj) => {
  * @returns {object}
  */
 export const buildReactLinkAttributes = (obj) => {
+    /** @type {Record<string, unknown>} */
     const attrs = {};
     for (const { key, value } of buildLinkAttributes(obj)) {
         if (key === 'crossorigin') attrs.crossOrigin = value || '';
diff --git a/lib/html.js b/lib/html.js
index c86e410..1e6fc79 100644
--- a/lib/html.js
+++ b/lib/html.js
@@ -3,7 +3,7 @@ import escapeHtml from 'escape-html';
 /**
  * Escape an untrusted string so it can be safely included in HTML.
  *
- * @param {unknown} string
+ * @param {string | null | undefined} string
  * @returns {string}
  */
 export function escape(string) {
@@ -38,7 +38,7 @@ export function html(strings, ...values) {
                 /** @type {DangerouslyIncludeUnescapedHTML} */ (value).content,
             );
         } else {
-            result.push(escape(value));
+            result.push(escape(String(value)));
         }
     }
     result.push(strings.at(-1));
@@ -61,6 +61,9 @@ export function html(strings, ...values) {
 export class DangerouslyIncludeUnescapedHTML {
     #content;
 
+    /**
+     * @param {{ __content: string}} param0
+     */
     constructor({ __content }) {
         this.#content = __content;
     }
diff --git a/lib/http-incoming.js b/lib/http-incoming.js
index e4454ce..7fe5ce8 100644
--- a/lib/http-incoming.js
+++ b/lib/http-incoming.js
@@ -3,9 +3,16 @@ import { Assets } from './assets.js';
 
 const inspect = Symbol.for('nodejs.util.inspect.custom');
 
+/**
+ * @param {unknown} request
+ * @returns {URL}
+ */
 const urlFromRequest = (request) => {
+    // @ts-expect-error
     const protocol = request?.protocol || 'http';
+    // @ts-expect-error
     const host = request?.headers?.host || 'localhost';
+    // @ts-expect-error
     const url = request?.url || '';
     return new URL(url, `${protocol.replace(':', '')}://${host}`);
 };
@@ -135,15 +142,21 @@ export default class HttpIncoming {
 
         podlets.forEach((podlet) => {
             if (podlet.css) {
-                podlet.css.forEach((item) => {
-                    this.#css.push(item);
-                });
+                podlet.css.forEach(
+                    /** @param {import("./asset-css.js").CssAsset} item  */
+                    (item) => {
+                        this.#css.push(item);
+                    },
+                );
             }
 
             if (podlet.js) {
-                podlet.js.forEach((item) => {
-                    this.#js.push(item);
-                });
+                podlet.js.forEach(
+                    /** @param {import("./asset-js.js").JavaScriptAsset} item  */
+                    (item) => {
+                        this.#js.push(item);
+                    },
+                );
             }
         });
     }
diff --git a/lib/utils.js b/lib/utils.js
index 4aecb81..4b52907 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -114,15 +114,20 @@ export const uriRelativeToAbsolute = (input = '', base = '', extra = '') => {
  * @returns {object} The http response object
  */
 export const setAtLocalsPodium = (response = {}, property, value) => {
+    // @ts-expect-error We know response is an object
     if (!response.locals) {
+        // @ts-expect-error We know response is an object
         response.locals = {};
     }
 
+    // @ts-expect-error We know response is an object
     if (!response.locals.podium) {
+        // @ts-expect-error We know response is an object
         response.locals.podium = {};
     }
 
     if (isString(property) && property !== '') {
+        // @ts-expect-error We know response is an object
         response.locals.podium[property] = value;
     }
 
@@ -133,20 +138,23 @@ export const setAtLocalsPodium = (response = {}, property, value) => {
  * Get the value from a property on .locals.podium on an HTTP response object.
  * Ensures that .locals.podium exists on the http response object.
  *
- * @param {object} [response] An HTTP response object.
+ * @param {unknown} [response] An HTTP response object.
  * @param {string} [property] Property for the value.
  * @returns {object | null} The property, or `null` if it does not exist.
  */
 export const getFromLocalsPodium = (response = {}, property) => {
+    // @ts-expect-error We know response is an object
     if (!response.locals) {
         return null;
     }
 
+    // @ts-expect-error We know response is an object
     if (!response.locals.podium) {
         return null;
     }
 
     if (isString(property) && property !== '') {
+        // @ts-expect-error We know response is an object
         return response.locals.podium[property];
     }
 
@@ -175,8 +183,8 @@ export const duplicateOnLocalsPodium = (
 /**
  * Serialize a context object into an HTTP header object, calling the function if a context value is callable.
  *
- * @param {object} [headers={}] An HTTP headers object the context will be copied to.
- * @param {object} [context={}]  A context object to copy from.
+ * @param {Record<string, string>} [headers={}] An HTTP headers object the context will be copied to.
+ * @param {Record<string, string | ((arg: unknown) => string)>} [context={}]  A context object to copy from.
  * @param {unknown} [arg=""] An argument value passed on to the function if a context value is a function.
  * @returns {object} An object with deserialized context properties and values.
  *
@@ -193,14 +201,18 @@ export const duplicateOnLocalsPodium = (
  * ```
  */
 export const serializeContext = (headers = {}, context = {}, arg = '') => {
+    /** @type {Record<string, string>} */
     const localHeaders = headers;
     Object.keys(context).forEach((key) => {
         if (isString(context[key])) {
-            localHeaders[key] = context[key];
+            localHeaders[key] = /** @type {string} */ (context[key]);
         }
 
         if (isFunction(context[key])) {
-            localHeaders[key] = context[key](arg);
+            const contextFn = /** @type {((arg: unknown) => string)} */ (
+                context[key]
+            );
+            localHeaders[key] = contextFn(arg);
         }
     });
     return localHeaders;
@@ -209,7 +221,7 @@ export const serializeContext = (headers = {}, context = {}, arg = '') => {
 /**
  * Deserialize a context object from an HTTP header object.
  *
- * @param {object} [headers={}] An HTTP headers object the context will be extracted from.
+ * @param {Record<string, string>} [headers={}] An HTTP headers object the context will be extracted from.
  * @param {string} [prefix="podium"] The prefix used to mark what properties are context properties.
  * @returns {object} An object with deserialized context properties and values.
  *
@@ -225,6 +237,7 @@ export const serializeContext = (headers = {}, context = {}, arg = '') => {
  * ```
  */
 export const deserializeContext = (headers = {}, prefix = 'podium') => {
+    /** @type {Record<string, string>} */
     const context = {};
     Object.keys(headers).forEach((key) => {
         if (key.startsWith(prefix)) {
diff --git a/package-lock.json b/package-lock.json
index 021c1fe..29dfbed 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,10 +14,11 @@
       },
       "devDependencies": {
         "@podium/client": "5.4.5",
-        "@podium/eslint-config": "1.0.21",
+        "@podium/eslint-config": "2.0.2",
         "@podium/schemas": "5.1.2",
         "@podium/semantic-release-config": "3.0.0",
         "@podium/typescript-config": "1.0.1",
+        "@types/escape-html": "1.0.4",
         "@types/node": "24.10.9",
         "benchmark": "2.1.4",
         "eslint": "9.39.3",
@@ -25,7 +26,7 @@
         "prettier": "3.8.1",
         "semantic-release": "25.0.2",
         "tap": "21.5.0",
-        "typescript": "5.9.3"
+        "typescript": "6.0.2"
       }
     },
     "node_modules/@actions/core": {
@@ -186,6 +187,28 @@
         "node": ">=12"
       }
     },
+    "node_modules/@e18e/eslint-plugin": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/@e18e/eslint-plugin/-/eslint-plugin-0.3.0.tgz",
+      "integrity": "sha512-hHgfpxsrZ2UYHcicA+tGZnmk19uJTaye9VH79O+XS8R4ona2Hx3xjhXghclNW58uXMk3xXlbYEOMr8thsoBmWg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "eslint-plugin-depend": "^1.5.0"
+      },
+      "peerDependencies": {
+        "eslint": "^9.0.0 || ^10.0.0",
+        "oxlint": "^1.55.0"
+      },
+      "peerDependenciesMeta": {
+        "eslint": {
+          "optional": true
+        },
+        "oxlint": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@eslint-community/eslint-utils": {
       "version": "4.9.0",
       "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.9.0.tgz",
@@ -1210,15 +1233,16 @@
       }
     },
     "node_modules/@podium/eslint-config": {
-      "version": "1.0.21",
-      "resolved": "https://registry.npmjs.org/@podium/eslint-config/-/eslint-config-1.0.21.tgz",
-      "integrity": "sha512-n9qfIEd0v6GfVngMKwyiCGTJAbq/xU2ilJkC3NiX+rJHdjJcC2ElgknHv7pYfz2I7Mux29AjqP80vzUn+yIAlg==",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@podium/eslint-config/-/eslint-config-2.0.2.tgz",
+      "integrity": "sha512-FC+O5utYdb/Xi5Ogk3duXit28kMRHo0UgdFl0iqZvCslw9QeRVBoObKTn8H2MHmkVlPqFK7Ch6WXuGK12falVA==",
       "dev": true,
       "license": "ISC",
       "dependencies": {
+        "@e18e/eslint-plugin": "0.3.0",
         "eslint-config-prettier": "10.1.8",
         "eslint-plugin-prettier": "5.5.5",
-        "globals": "16.5.0"
+        "globals": "17.4.0"
       },
       "peerDependencies": {
         "eslint": ">= 9"
@@ -2398,6 +2422,20 @@
         "@tapjs/core": "4.4.0"
       }
     },
+    "node_modules/@tapjs/test/node_modules/typescript": {
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
     "node_modules/@tapjs/typescript": {
       "version": "3.5.0",
       "resolved": "https://registry.npmjs.org/@tapjs/typescript/-/typescript-3.5.0.tgz",
@@ -2505,6 +2543,13 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/@types/escape-html": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@types/escape-html/-/escape-html-1.0.4.tgz",
+      "integrity": "sha512-qZ72SFTgUAZ5a7Tj6kf2SHLetiH5S6f8G5frB2SPQ3EyF02kxdyBFf4Tz4banE3xCgGnKgWLt//a6VuYHKYJTg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/estree": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
@@ -3561,6 +3606,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/empathic": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/empathic/-/empathic-2.0.0.tgz",
+      "integrity": "sha512-i6UzDscO/XfAcNYD75CfICkmfLedpyPDdozrLMmQc5ORaQcdMoc21OnlEylMIqI7U8eniKrPMxxtj8k0vhmJhA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=14"
+      }
+    },
     "node_modules/encoding": {
       "version": "0.1.13",
       "resolved": "https://registry.npmjs.org/encoding/-/encoding-0.1.13.tgz",
@@ -3886,6 +3941,21 @@
         "eslint": ">=7.0.0"
       }
     },
+    "node_modules/eslint-plugin-depend": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-depend/-/eslint-plugin-depend-1.5.0.tgz",
+      "integrity": "sha512-i3UeLYmclf1Icp35+6W7CR4Bp2PIpDgBuf/mpmXK5UeLkZlvYJ21VuQKKHHAIBKRTPivPGX/gZl5JGno1o9Y0A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "empathic": "^2.0.0",
+        "module-replacements": "^2.10.1",
+        "semver": "^7.6.3"
+      },
+      "peerDependencies": {
+        "eslint": ">=8.40.0"
+      }
+    },
     "node_modules/eslint-plugin-prettier": {
       "version": "5.5.5",
       "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-5.5.5.tgz",
@@ -4470,9 +4540,9 @@
       }
     },
     "node_modules/globals": {
-      "version": "16.5.0",
-      "resolved": "https://registry.npmjs.org/globals/-/globals-16.5.0.tgz",
-      "integrity": "sha512-c/c15i26VrJ4IRt5Z89DnIzCGDn9EcebibhAOjw5ibqEHsE1wLUgkPn9RDmNcUKyU87GeaL633nyJ+pplFR2ZQ==",
+      "version": "17.4.0",
+      "resolved": "https://registry.npmjs.org/globals/-/globals-17.4.0.tgz",
+      "integrity": "sha512-hjrNztw/VajQwOLsMNT1cbJiH2muO3OROCHnbehc8eY5JyD2gqz4AcMHPqgaOR59DjgUjYAYLeH699g/eWi2jw==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -5742,6 +5812,13 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/module-replacements": {
+      "version": "2.11.0",
+      "resolved": "https://registry.npmjs.org/module-replacements/-/module-replacements-2.11.0.tgz",
+      "integrity": "sha512-j5sNQm3VCpQQ7nTqGeOZtoJtV3uKERgCBm9QRhmGRiXiqkf7iRFOkfxdJRZWLkqYY8PNf4cDQF/WfXUYLENrRA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -10724,6 +10801,20 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/tshy/node_modules/typescript": {
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
     "node_modules/ttl-mem-cache": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/ttl-mem-cache/-/ttl-mem-cache-4.1.0.tgz",
@@ -10801,9 +10892,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.9.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
-      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.2.tgz",
+      "integrity": "sha512-bGdAIrZ0wiGDo5l8c++HWtbaNCWTS4UTv7RaTH/ThVIgjkveJt83m74bBHMJkuCbslY8ixgLBVZJIOiQlQTjfQ==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
diff --git a/package.json b/package.json
index 69a211c..2ddd3a3 100644
--- a/package.json
+++ b/package.json
@@ -41,10 +41,11 @@
   },
   "devDependencies": {
     "@podium/client": "5.4.5",
-    "@podium/eslint-config": "1.0.21",
+    "@podium/eslint-config": "2.0.2",
     "@podium/schemas": "5.1.2",
     "@podium/semantic-release-config": "3.0.0",
     "@podium/typescript-config": "1.0.1",
+    "@types/escape-html": "1.0.4",
     "@types/node": "24.10.9",
     "benchmark": "2.1.4",
     "eslint": "9.39.3",
@@ -52,10 +53,10 @@
     "prettier": "3.8.1",
     "semantic-release": "25.0.2",
     "tap": "21.5.0",
-    "typescript": "5.9.3"
+    "typescript": "6.0.2"
   },
   "dependencies": {
     "camelcase": "8.0.0",
     "escape-html": "1.0.3"
   }
-}
\ No newline at end of file
+}
diff --git a/tests/html-utils.test.js b/tests/html-utils.test.js
index 929d584..cf13c28 100644
--- a/tests/html-utils.test.js
+++ b/tests/html-utils.test.js
@@ -165,14 +165,22 @@ tap.test(
     '.buildLinkElement() - properties are "null" - should NOT appended attributes to element',
     (t) => {
         const obj = new AssetCss({
+            // @ts-expect-error Testing bad input
             crossorigin: null,
+            // @ts-expect-error Testing bad input
             disabled: null,
+            // @ts-expect-error Testing bad input
             hreflang: null,
+            // @ts-expect-error Testing bad input
             title: null,
+            // @ts-expect-error Testing bad input
             media: null,
             value: '/foo',
+            // @ts-expect-error Testing bad input
             type: null,
+            // @ts-expect-error Testing bad input
             rel: null,
+            // @ts-expect-error Testing bad input
             as: null,
         });
         const result = utils.buildLinkElement(obj);
@@ -425,13 +433,20 @@ tap.test(
     '.buildScriptElement() - properties are "null" - should NOT appended attributes to element',
     (t) => {
         const obj = new AssetJs({
+            // @ts-expect-error Testing bad input
             referrerpolicy: null,
+            // @ts-expect-error Testing bad input
             crossorigin: null,
+            // @ts-expect-error Testing bad input
             integrity: null,
+            // @ts-expect-error Testing bad input
             nomodule: null,
+            // @ts-expect-error Testing bad input
             async: null,
+            // @ts-expect-error Testing bad input
             defer: null,
             value: '/foo',
+            // @ts-expect-error Testing bad input
             type: null,
         });
         const result = utils.buildScriptElement(obj);
diff --git a/tests/http-incoming.test.js b/tests/http-incoming.test.js
index 245cd50..93455ab 100644
--- a/tests/http-incoming.test.js
+++ b/tests/http-incoming.test.js
@@ -99,6 +99,7 @@ tap.test('PodiumHttpIncoming.request - set value', (t) => {
     const incoming = new HttpIncoming(ADVANCED_REQ, SIMPLE_RES);
     t.throws(
         () => {
+            // @ts-expect-error Testing bad input
             incoming.request = 'foo';
         },
         /Cannot set read-only property./,
@@ -112,6 +113,7 @@ tap.test('PodiumHttpIncoming.response - set value', (t) => {
     const incoming = new HttpIncoming(ADVANCED_REQ, SIMPLE_RES);
     t.throws(
         () => {
+            // @ts-expect-error Testing bad input
             incoming.response = 'foo';
         },
         /Cannot set read-only property./,
diff --git a/tests/utils.test.js b/tests/utils.test.js
index e836925..58696d6 100644
--- a/tests/utils.test.js
+++ b/tests/utils.test.js
@@ -820,7 +820,9 @@ tap.test(
     (t) => {
         const context = {
             'podium-foo': 'bar',
-            'podium-bar': (name) => `${name}-test`,
+            'podium-bar':
+                /** @param {unknown} name  */
+                (name) => `${name}-test`,
         };
 
         const headers = {
diff --git a/tsconfig.json b/tsconfig.json
index 19707f1..12c07d0 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,7 +1,9 @@
 {
-    "extends": "@podium/typescript-config/module.json",
-    "include": ["./lib/**/*.js"],
-    "compilerOptions": {
-        "outDir": "types"
-    }
+  "extends": "@podium/typescript-config/module.json",
+  "include": ["./lib/**/*.js"],
+  "compilerOptions": {
+    "types": ["node", "escape-html"],
+    "rootDir": "lib",
+    "outDir": "types"
+  }
 }
diff --git a/tsconfig.test.json b/tsconfig.test.json
index 2bd90d8..c635836 100644
--- a/tsconfig.test.json
+++ b/tsconfig.test.json
@@ -1,4 +1,7 @@
 {
-    "extends": "@podium/typescript-config/test.json",
-    "include": ["./tests/**/*.js"]
+  "extends": "@podium/typescript-config/test.json",
+  "include": ["./tests/**/*.js"],
+  "compilerOptions": {
+    "rootDir": "."
+  }
 }