diff --git a/copyparty/httpcli.py b/copyparty/httpcli.py
index 2af7fa30..85b33d04 100644
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -3800,10 +3800,14 @@ class HttpCli(object):
         }
 
         if self.args.js_browser:
-            j2a["js"] = self.args.js_browser
+            zs = self.args.js_browser
+            zs += "&" if "?" in zs else "?"
+            j2a["js"] = zs
 
         if self.args.css_browser:
-            j2a["css"] = self.args.css_browser
+            zs = self.args.css_browser
+            zs += "&" if "?" in zs else "?"
+            j2a["css"] = zs
 
         if not self.conn.hsrv.prism:
             j2a["no_prism"] = True
diff --git a/copyparty/web/browser.html b/copyparty/web/browser.html
index 35782b9d..77324346 100644
--- a/copyparty/web/browser.html
+++ b/copyparty/web/browser.html
@@ -11,7 +11,7 @@
 	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/ui.css?_={{ ts }}">
 	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/browser.css?_={{ ts }}">
 	{%- if css %}
-	<link rel="stylesheet" media="screen" href="{{ css }}?_={{ ts }}">
+	<link rel="stylesheet" media="screen" href="{{ css }}_={{ ts }}">
 	{%- endif %}
 </head>
 
@@ -173,7 +173,7 @@
 	<script src="{{ r }}/.cpr/browser.js?_={{ ts }}"></script>
 	<script src="{{ r }}/.cpr/up2k.js?_={{ ts }}"></script>
 	{%- if js %}
-	<script src="{{ js }}?_={{ ts }}"></script>
+	<script src="{{ js }}_={{ ts }}"></script>
 	{%- endif %}
 </body>