diff --git a/copyparty/util.py b/copyparty/util.py
index 17809164..21cffe25 100644
--- a/copyparty/util.py
+++ b/copyparty/util.py
@@ -1030,7 +1030,13 @@ def guess_mime(url, fallback="application/octet-stream"):
     except:
         return fallback
 
-    return MIMES.get(ext) or mimetypes.guess_type(url)[0] or fallback
+    ret = MIMES.get(ext) or mimetypes.guess_type(url)[0] or fallback
+
+    if ";" not in ret:
+        if ret.startswith("text/") or ret.endswith("/javascript"):
+            ret += "; charset=UTF-8"
+    
+    return ret
 
 
 def runcmd(*argv):
diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index 06637248..975ca58d 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -1664,7 +1664,7 @@ document.onkeydown = function (e) {
 	if (e.ctrlKey || e.altKey || e.shiftKey || e.metaKey || e.isComposing)
 		return;
 
-	var k = (e.code + ''), pos = -1;
+	var k = (e.code + ''), pos = -1, n;
 	if (k.indexOf('Digit') === 0)
 		pos = parseInt(k.slice(-1)) * 0.1;