diff --git a/javascript/package-lock.json b/javascript/package-lock.json
index d38ebe51..e7ee771e 100644
--- a/javascript/package-lock.json
+++ b/javascript/package-lock.json
@@ -25,14 +25,14 @@
         "@types/chai-xml": "^0.3.6",
         "@types/luxon": "^3.4.2",
         "@types/mocha": "^10.0.6",
-        "@types/node": "24.12.4",
+        "@types/node": "^22",
         "chai": "^6.0.0",
         "chai-almost": "^1.0.1",
         "chai-xml": "^0.4.1",
         "globby": "^16.0.0",
         "mocha": "^11.0.0",
         "ts-node": "^10.9.1",
-        "typescript": "5.9.3"
+        "typescript": "6.0.3"
       },
       "peerDependencies": {
         "@cucumber/messages": "*"
@@ -461,13 +461,13 @@
       "license": "MIT"
     },
     "node_modules/@types/node": {
-      "version": "24.12.4",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-24.12.4.tgz",
-      "integrity": "sha512-GUUEShf+PBCGW2KaXwcIt3Yk+e3pkKwWKb9GSyM9WQVE+ep2jzmHdGsHzu4wgcZy5fN9FBdVzjpBQsYlpfpgLA==",
+      "version": "22.19.19",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.19.tgz",
+      "integrity": "sha512-dyh/xO2Fh5bYrfWaaqGrRQQGkNdmYw6AmaAUvYeUMNTWQtvb796ikLdmTchRmOlOiIJ1TDXfWgVx1QkUlQ6Hew==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "undici-types": "~7.16.0"
+        "undici-types": "~6.21.0"
       }
     },
     "node_modules/acorn": {
@@ -1885,9 +1885,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.9.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
-      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.3.tgz",
+      "integrity": "sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
@@ -1899,9 +1899,9 @@
       }
     },
     "node_modules/undici-types": {
-      "version": "7.16.0",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
-      "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==",
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
       "dev": true,
       "license": "MIT"
     },
diff --git a/javascript/package.json b/javascript/package.json
index 0a965509..509c58ba 100644
--- a/javascript/package.json
+++ b/javascript/package.json
@@ -13,12 +13,12 @@
   "author": "David Goss",
   "license": "MIT",
   "scripts": {
-    "build": "tsc --build tsconfig.build.json",
+    "build": "tsc -p tsconfig.build.json",
     "clean": "rm -rf dist",
     "fix": "biome check --fix --error-on-warnings",
     "lint": "biome check --error-on-warnings",
     "test": "mocha \"src/**/*.spec.ts\"",
-    "prepublishOnly": "tsc --build tsconfig.build.json"
+    "prepublishOnly": "npm run build"
   },
   "dependencies": {
     "@cucumber/query": "^15.0.1",
@@ -40,13 +40,13 @@
     "@types/chai-xml": "^0.3.6",
     "@types/luxon": "^3.4.2",
     "@types/mocha": "^10.0.6",
-    "@types/node": "24.12.4",
+    "@types/node": "^22",
     "chai": "^6.0.0",
     "chai-almost": "^1.0.1",
     "chai-xml": "^0.4.1",
     "globby": "^16.0.0",
     "mocha": "^11.0.0",
     "ts-node": "^10.9.1",
-    "typescript": "5.9.3"
+    "typescript": "6.0.3"
   }
 }
diff --git a/javascript/tsconfig.build.json b/javascript/tsconfig.build.json
index 74cb3c9a..851de8ae 100644
--- a/javascript/tsconfig.build.json
+++ b/javascript/tsconfig.build.json
@@ -1,5 +1,9 @@
 {
   "extends": "./tsconfig.json",
   "include": ["src"],
-  "exclude": ["src/**/*.spec.*"]
+  "exclude": ["src/**/*.spec.*"],
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "dist"
+  }
 }
diff --git a/javascript/tsconfig.json b/javascript/tsconfig.json
index b2f1a3ad..26339602 100644
--- a/javascript/tsconfig.json
+++ b/javascript/tsconfig.json
@@ -2,10 +2,13 @@
   "extends": "@tsconfig/recommended/tsconfig.json",
   "include": ["src"],
   "compilerOptions": {
-    "lib": ["dom", "es2023"],
-    "target": "es2022",
+    "lib": ["es2024"],
+    "target": "es2024",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "types": ["node", "mocha", "chai"],
     "declaration": true,
-    "outDir": "dist",
-    "inlineSourceMap": true
+    "inlineSourceMap": true,
+    "inlineSources": true
   }
 }