diff --git a/example/typescript/tsconfig.json b/example/typescript/tsconfig.json
index 5e9e1975..10ed2dc6 100644
--- a/example/typescript/tsconfig.json
+++ b/example/typescript/tsconfig.json
@@ -1,11 +1,14 @@
 {
   "compilerOptions": {
-    "target": "es2015",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
-    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    "strict": true,                           /* Enable all strict type-checking options. */
-    "noUnusedLocals": true,                   /* Report errors on unused locals. */
-    "noUnusedParameters": true,               /* Report errors on unused parameters. */
-    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
-    "forceConsistentCasingInFileNames": true  /* Disallow inconsistently-cased references to the same file. */
+    "esModuleInterop": true,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitAny": true,
+    "noImplicitOverride": true,
+    "noImplicitReturns": true,
+    "noImplicitThis": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "strict": true,
   }
 }
diff --git a/package.json b/package.json
index 83479ec7..5df17380 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "serial-declaration-demo": "npm run build-declaration && npm-run-all --continue-on-error --parallel build-demo test-declaration",
     "test": "ava --timeout=30s test/markdownlint-test.js test/markdownlint-test-config.js test/markdownlint-test-custom-rules.js test/markdownlint-test-helpers.js test/markdownlint-test-micromark.mjs test/markdownlint-test-result-object.js test/markdownlint-test-scenarios.js",
     "test-cover": "c8 --100 npm test",
-    "test-declaration": "cd example/typescript && tsc && node type-check.js",
+    "test-declaration": "cd example/typescript && tsc --module commonjs && node type-check.js",
     "test-extra": "ava --timeout=10m test/markdownlint-test-extra-parse.js test/markdownlint-test-extra-type.js",
     "update-snapshots": "ava --update-snapshots test/markdownlint-test-micromark.mjs test/markdownlint-test-scenarios.js",
     "update-snapshots-test-repos": "ava --timeout=10m --update-snapshots test/markdownlint-test-repos-*.js",