diff --git a/heat-stack/tsconfig.json b/heat-stack/tsconfig.json
index 8b89cba2..cf5a85f3 100644
--- a/heat-stack/tsconfig.json
+++ b/heat-stack/tsconfig.json
@@ -1,12 +1,12 @@
 {
 	"extends": ["@epic-web/config/typescript"],	// Uses a shared TypeScript configuration provided by the @epic-web package as the base.
 	"compilerOptions": {
-		"target": "ES2020",	// Compile TypeScript code to ECMAScript 2018.
+		"target": "ES2018",	// Compile TypeScript code to ECMAScript 2018.
     "lib": ["DOM", "DOM.Iterable", "ESNext"],	// Includes type definitions for the DOM, DOM iterables, and modern ECMAScript features.
     "allowJs": true,	// Enables the inclusion of .js files in the project.
     "skipLibCheck": true, // Skip type checking of all declaration files (*.d.ts).
-    "noUncheckedIndexedAccess": true,
-		"allowImportingTsExtensions": true,
+    // "noUncheckedIndexedAccess": true,
+		// "allowImportingTsExtensions": true,
 		"esModuleInterop": true,	// Enables compatibility with CommonJS modules.
     "allowSyntheticDefaultImports": true, // Allows default imports from modules with no default export.
     "strict": true, // Enables all strict type-checking options.
@@ -26,5 +26,8 @@
 				"./types/icon-name.d.ts" //	icon-name.d.ts file in the types directory.
 			]
 		}
-	}
+	},
+	"exclude": [
+		"build"
+	]
 }