diff --git a/webui/src/styles/postbox.css b/webui/src/styles/postbox.css
index 7c2f4e1..790ce5f 100644
--- a/webui/src/styles/postbox.css
+++ b/webui/src/styles/postbox.css
@@ -646,7 +646,7 @@
   color: var(--muted);
 }
 
-@media (max-width: 1180px) {
+@media (max-width: 1280px) {
   .postbox-shell {
     grid-template-columns: minmax(230px, 290px) minmax(280px, 340px) minmax(330px, 1fr);
     overflow-x: auto;
@@ -693,7 +693,7 @@
   }
 }
 
-@media (max-width: 640px) {
+@media (max-width: 680px) {
   .postbox-provenance dl,
   .postbox-admin-properties {
     grid-template-columns: 1fr;