diff --git a/package.json b/package.json
index b39d0b9..0ad6e1c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@technote-space/hello-genetic-algorithm",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "Hello Genetic Algorithm",
   "author": {
     "name": "Technote",
diff --git a/src/GeneticAlgorithm.js b/src/GeneticAlgorithm.ts
similarity index 100%
rename from src/GeneticAlgorithm.js
rename to src/GeneticAlgorithm.ts
diff --git a/tsconfig.json b/tsconfig.json
index 75d6b7a..e5cdf5e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,9 +6,9 @@
     /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
     "module": "ESNext",
     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    "allowJs": true,
+    // "allowJs": true,
     /* Allow javascript files to be compiled. */
-    "checkJs": true,
+    // "checkJs": true,
     /* Report errors in .js files. */
     "jsx": "react",
     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */