diff --git a/src/index.ts b/src/index.ts
index ce2e98d..29f2b7e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -401,5 +401,5 @@ const updatePackageJson = (
     pkg.name = name;
   }
 
-  fs.writeFileSync(pkgJsonPath, JSON.stringify(pkg, null, 2));
+  fs.writeFileSync(pkgJsonPath, `${JSON.stringify(pkg, null, 2)}\n`);
 };