diff --git a/.gitignore b/.gitignore
index d46e704e..0aaa5f0d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,4 +29,6 @@ public/uploads/*
 /.nyc_output
 /coverage/
 
-.vscode/settings.json
\ No newline at end of file
+.vscode/settings.json
+
+/dist
diff --git a/package-lock.json b/package-lock.json
index 858ccc8d..fe97f2fb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15937,6 +15937,12 @@
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
     },
+    "typescript": {
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.2.tgz",
+      "integrity": "sha512-zZ4hShnmnoVnAHpVHWpTcxdv7dWP60S2FsydQLV8V5PbS3FifjWFFRiHSWpDJahly88PRyV5teTSLoq4eG7mKw==",
+      "dev": true
+    },
     "typo-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/typo-js/-/typo-js-1.0.3.tgz",
diff --git a/package.json b/package.json
index a55ecc92..f493fd42 100644
--- a/package.json
+++ b/package.json
@@ -110,6 +110,7 @@
     "@hackmd/idle-js": "~1.0.1",
     "@hackmd/js-sequence-diagrams": "~0.0.1-alpha.3",
     "@susisu/mte-kernel": "^2.1.0",
+    "@types/node": "^10.17.14",
     "acorn": "~6.1.1",
     "babel-core": "~6.26.3",
     "babel-loader": "~7.1.4",
@@ -191,6 +192,7 @@
     "style-loader": "~0.23.1",
     "tedious": "~6.2.0",
     "turndown": "~5.0.3",
+    "typescript": "^4.3.2",
     "typo-js": "^1.0.3",
     "uglifyjs-webpack-plugin": "~1.2.7",
     "url-loader": "~1.0.1",
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 00000000..f4cd87fd
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compileOnSave": true,
+  "compilerOptions": {
+    "allowJs": true,
+    "target": "ES5",
+    "outDir": "./dist/"
+  },
+  "include": [
+    "./lib/**/*"
+  ]
+}