diff --git a/hubzilla/addon/scn01/view/css/scn01.css b/hubzilla/addon/scn01/view/css/scn01.css
index cca5443..4a3e9e5 100644
--- a/hubzilla/addon/scn01/view/css/scn01.css
+++ b/hubzilla/addon/scn01/view/css/scn01.css
@@ -20,6 +20,12 @@
     cursor: not-allowed;
 }
 
+/* --- Category filter --- */
+
+.scn01-filter select {
+    max-width: 16rem;
+}
+
 .scn01-pinned-label {
     margin-bottom: 0.25rem;
 }