diff --git a/i18n-sample/.vscode/launch.json b/i18n-sample/.vscode/launch.json
index 30625e88..81600682 100644
--- a/i18n-sample/.vscode/launch.json
+++ b/i18n-sample/.vscode/launch.json
@@ -11,7 +11,7 @@
             "stopOnEntry": false,
             "sourceMaps": true,
             "outFiles": [ "${workspaceRoot}/out/src/**/*.js" ],
-            "preLaunchTask": "npm"
+            "preLaunchTask": "npm: watch"
         }
     ]
 }