diff --git a/frontend/packages/dashboard/src/tabs.js b/frontend/packages/dashboard/src/tabs.js
index 3cb099e5..bfa66b06 100644
--- a/frontend/packages/dashboard/src/tabs.js
+++ b/frontend/packages/dashboard/src/tabs.js
@@ -283,7 +283,7 @@ window.marked = marked;
 
   // Single-agent POST helper shared by all menu items.
   async function agentMenuPost(actionPath, name, body, graceful) {
-    const url = actionPath + encodeURIComponent(name) + (graceful ? '?graceful=1' : '');
+    const url = actionPath + encodeURIComponent(name) + (graceful ? '?graceful=true' : '');
     try {
       const resp = await fetch(url, {
         method: 'POST',
@@ -1208,7 +1208,7 @@ window.marked = marked;
           : new URLSearchParams(opts.body || {});
         const url = opts.perAgentBodyFor
           ? opts.action
-          : opts.action + encodeURIComponent(name) + (graceful ? '?graceful=1' : '');
+          : opts.action + encodeURIComponent(name) + (graceful ? '?graceful=true' : '');
         try {
           const resp = await fetch(url, {
             method: 'POST',