diff --git a/tsconfig.json b/tsconfig.json
index d9a8fef..43e4d3c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,10 +1,10 @@
 {
   "compilerOptions": {
-    "module": "ES2020",
-    "target": "ES2019",
+    "module": "ES2015",
+    "target": "ES5",
     "importHelpers": false,
     "sourceMap": true,
-    "lib": ["DOM", "ES2019"],
+    "lib": ["DOM", "ES2015", "es2016.array.include", "es2017.object"],
     "composite": true,
     "declaration": true,
     "declarationMap": true,