diff --git a/tsconfig.build.json b/tsconfig.build.json
index c486802a..aa9cf1d6 100644
--- a/tsconfig.build.json
+++ b/tsconfig.build.json
@@ -1,6 +1,11 @@
 {
   "extends": "./tsconfig",
+  "compilerOptions": {
+    "outDir": "lib"
+  },
   "exclude": [
-    "./src/*.test.ts"
+    "src/**/*.test.ts",
+    "test",
+    "dangerfile.ts"
   ]
-}
+}
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
index 0dcdbbcd..9ec6991f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,6 +1,13 @@
 {
   "extends": "tsconfigs/nodejs-module",
   "compilerOptions": {
-    "outDir": "lib"
+    "lib": [
+      "ES2019"
+    ],
+    "target": "ES2019"
   },
-}
+  "include": [
+    "src/**/*.ts",
+    "test/**/*.ts"
+  ]
+}
\ No newline at end of file