diff --git a/developer/js/source/index.ts b/developer/js/source/index.ts
index 5ef9ea5c5f..a3d26aadb0 100644
--- a/developer/js/source/index.ts
+++ b/developer/js/source/index.ts
@@ -182,6 +182,8 @@ export default class LexicalModelCompiler {
     set_model_metadata('sourcePath', [groupPath, authorPath, bcp47Path].join('/'));
 
     fs.writeFileSync(modelInfoFileName, JSON.stringify(model_info, null, 2));
+
+    return true;
   };
 
   /**
diff --git a/developer/js/tsconfig.json b/developer/js/tsconfig.json
index 055a956c44..95daf1fe1c 100644
--- a/developer/js/tsconfig.json
+++ b/developer/js/tsconfig.json
@@ -1,9 +1,11 @@
 {
   "compilerOptions": {
-    "target": "es2017",
     "module": "commonjs",
-    "outDir": "dist",
+    "target": "es2017",
+    "noImplicitReturns": true,
+    "moduleResolution": "node",
     "sourceMap": true,
+    "outDir": "dist",
     "declaration": true
   },
   "include": [