diff --git a/snappymail/v/0.0.0/themes/SquaresDark/styles.css b/snappymail/v/0.0.0/themes/SquaresDark/styles.css
index 1dc3b2370..115ccf1c9 100644
--- a/snappymail/v/0.0.0/themes/SquaresDark/styles.css
+++ b/snappymail/v/0.0.0/themes/SquaresDark/styles.css
@@ -150,6 +150,6 @@
 
 .select, select {
     background: #000 url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' height='10px' width='15px'><text x='0' y='10' fill='rgb(255,255,255)'>▾</text></svg>") right center/1em no-repeat border-box;
-    border: 1px solid #ccc;
+    border-color: #aaa;
     color: #fff;
 }