diff --git a/stylesheets/dropdowns.less b/stylesheets/dropdowns.less
index 270a1ff..410823a 100644
--- a/stylesheets/dropdowns.less
+++ b/stylesheets/dropdowns.less
@@ -5,7 +5,6 @@
 .dropdown-menu {
   background-color: @overlay-background-color;
   border-radius: @component-border-radius;
-  border: 1px solid @base-border-color;
   padding: 0;
 
   > li > a {
diff --git a/stylesheets/overlays.less b/stylesheets/overlays.less
index f080dfd..739c5b1 100644
--- a/stylesheets/overlays.less
+++ b/stylesheets/overlays.less
@@ -4,7 +4,6 @@
   color: @text-color;
   background-color: @overlay-background-color;
   padding: @component-padding;
-  border: 1px solid @overlay-border-color;
   border-radius: @component-border-radius;
 
   .editor.mini {
@@ -18,7 +17,6 @@
 
     li {
       padding: @component-padding;
-      border-bottom: 1px solid @overlay-background-color;
 
       &.two-lines { padding: @component-padding/2 @component-padding; }
 
diff --git a/stylesheets/panels.less b/stylesheets/panels.less
index ade6077..b202b10 100644
--- a/stylesheets/panels.less
+++ b/stylesheets/panels.less
@@ -4,7 +4,6 @@
 
 .panel {
   &.bordered {
-    border: 1px solid @base-border-color;
     border-radius: @component-border-radius;
   }
 }