diff --git a/rc/appearance.lua b/rc/appearance.lua
index 00634ee..ee7b6e9 100644
--- a/rc/appearance.lua
+++ b/rc/appearance.lua
@@ -83,6 +83,17 @@ GtkEntry, GtkTextView
 {
   gtk-key-bindings: custom-text-entry;
 }
+
+.window-frame, .window-frame:backdrop {
+  box-shadow: 0 0 0 black;
+  border-style: none;
+  margin: 0;
+  border-radius: 0;
+}
+
+.titlebar {
+  border-radius: 0;
+}
 ]])
 gtk3:close()