diff --git a/themes/Atom - Dark/editor.css b/themes/Atom - Dark/editor.css
index 6581aaa59..8e18a0ed9 100644
--- a/themes/Atom - Dark/editor.css	
+++ b/themes/Atom - Dark/editor.css	
@@ -4,6 +4,10 @@
 
 .editor.mini {
   height: auto;
+  line-height: 20px;
+  border: 1px solid rgba(0, 0, 0, 0.2);
+  border-bottom: 1px solid rgba(180, 180, 180, 0.2);
+  border-right: 1px solid rgba(180, 180, 180, 0.2);
 }
 
 .editor .gutter .line-number {