diff --git a/.gitignore b/.gitignore
index e7a3afa..4f530c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -86,7 +86,7 @@ tags
 # IDE
 .idea/
 .c9/
+.vscode/
 
 # build artifacts
-src/**/*.js
-src/**/*.d.ts
+target/
diff --git a/package.json b/package.json
index 0794d89..d1a6eca 100644
--- a/package.json
+++ b/package.json
@@ -2,18 +2,15 @@
   "name": "it-fsm",
   "version": "1.0.7",
   "description": "Simple finite state machine for nodejs",
-  "main": "./src/index.js",
-  "types": "./src/index.d.ts",
+  "main": "./target/index.js",
+  "types": "./target/index.d.ts",
   "readme": "README.md",
   "files": [
-    "src",
-    "!*.spec.ts",
-    "!*.ts",
-    "*.d.ts"
+    "target"
   ],
   "scripts": {
     "test": "jest",
-    "prepublishOnly": "tsc",
+    "prepublishOnly": "rm -rf ./target && tsc",
     "report-coverage": "cat coverage/lcov.info | coveralls"
   },
   "repository": {
diff --git a/tsconfig.json b/tsconfig.json
index 870495a..d14e20f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -15,13 +15,13 @@
     "noImplicitReturns": true,
     "noImplicitThis": true,
     "noUnusedParameters": true,
+    "strict": true,
     "strictNullChecks": true,
     "esModuleInterop": true,
-    "outDir": "./src"
+    "rootDir": "src",
+    "outDir": "target"
   },
-  "exclude": [
-    "node_modules",
-    "coverage",
-    "tests"
+  "include": [
+    "src"
   ]
 }