diff --git a/tsconfig.json b/tsconfig.json
index d9994741..655fb804 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -17,15 +17,14 @@
     "skipLibCheck": true,
     "sourceMap": true,
     "strict": true,
-    "target": "esnext",
+    "target": "es2019",
     "forceConsistentCasingInFileNames": true,
     "esModuleInterop": true,
     "resolveJsonModule": true,
     "isolatedModules": true
   },
   "exclude": [
-    "node_modules",
-    "**/*.spec.*"
+    "node_modules"
   ],
   "include": [
     "*.d.ts",