diff --git a/files/routes/subs.py b/files/routes/subs.py
index 0a233cf5b..f6c29406b 100644
--- a/files/routes/subs.py
+++ b/files/routes/subs.py
@@ -358,15 +358,16 @@ def post_sub_css(v, sub):
 	sub = g.db.query(Sub).filter_by(name=sub.strip().lower()).one_or_none()
 	css = request.values.get('css', '').strip()
 
-	if not sub:
-		abort(404)
-	if not v.mods(sub.name):
-		abort(403)
+	if not sub: abort(404)
+	if not v.mods(sub.name): abort(403)
+
+	if len(css) > 6000:
+		error = "CSS is too long (max 6000 characters)"
+		return render_template('sub/settings.html', v=v, sidebar=sub.sidebar, sub=sub, error=error)
 
 	valid, error = validate_css(css)
 	if not valid:
-		return render_template('sub/settings.html',
-			v=v, sidebar=sub.sidebar, sub=sub, error=error)
+		return render_template('sub/settings.html', v=v, sidebar=sub.sidebar, sub=sub, error=error)
 
 	sub.css = css
 	g.db.add(sub)
diff --git a/files/templates/sub/settings.html b/files/templates/sub/settings.html
index f0f591cc1..5156700f1 100644
--- a/files/templates/sub/settings.html
+++ b/files/templates/sub/settings.html
@@ -134,7 +134,7 @@
 				<div class="w-lg-100">
 					<form id="css" action="/h/{{sub.name}}/css" method="post">
 						<input type="hidden" name="formkey" value="{{v.formkey}}">
-						<textarea autocomplete="off" maxlength="4000" class="form-control rounded" id="bio-text" aria-label="With textarea" placeholder="Enter css here..." rows="10" name="css" form="css">{% if sub.css %}{{sub.css}}{% endif %}</textarea>
+						<textarea autocomplete="off" maxlength="6000" class="form-control rounded" id="bio-text" aria-label="With textarea" placeholder="Enter css here..." rows="10" name="css" form="css">{% if sub.css %}{{sub.css}}{% endif %}</textarea>
 
 						<div class="d-flex mt-2">
 							<input autocomplete="off" class="btn btn-primary ml-auto" type="submit" onclick="disable(this)" value="Save">
diff --git a/schema.sql b/schema.sql
index e80973c58..00e7cf479 100644
--- a/schema.sql
+++ b/schema.sql
@@ -718,7 +718,7 @@ CREATE TABLE public.subs (
     sidebar_html character varying(20000),
     sidebarurl character varying(60),
     bannerurl character varying(60),
-    css character varying(4000)
+    css character varying(6000)
 );