diff --git a/tsconfig.json b/tsconfig.json
index 3c1f15d..dab32c9 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,11 +1,11 @@
 {
   "compilerOptions": {
-    "target": "ES2020",
+    "target": "ES2019",
     "module": "commonjs",
     "moduleResolution": "node",
     "esModuleInterop": true,
     "lib": [
-      "es2020",
+      "ES2019",
     ],
     "declaration": true,
     "outDir": "dist",