diff --git a/web/templates/settings/home.html b/web/templates/settings/home.html
index 084ed4c..d640bf9 100644
--- a/web/templates/settings/home.html
+++ b/web/templates/settings/home.html
@@ -223,8 +223,9 @@
   // Helpers
   function getCookie(name){ const m=document.cookie.match("(^|;)\\s*"+name+"\\s*=\\s*([^;]+)"); return m?m.pop():""; }
   function setTheme(name){
+    var v='{{ APP_VERSION }}';
     var link=document.getElementById('theme-css');
-    if(link) link.href='{% static "themes/" %}'+name+'.css';
+    if(link) link.href='{% static "themes/" %}'+name+'.css?v='+v;  // << cache-busted preview
     document.documentElement.setAttribute('data-theme',name);
     try{ localStorage.setItem('theme',name); }catch(e){}
     if(name==='classic'){ document.body.classList.add('themed-bg'); } else { document.body.classList.remove('themed-bg'); }