diff --git a/breccia_mapper/static/css/masthead.css b/breccia_mapper/static/css/masthead.css
index 79b9aa6..e4364db 100644
--- a/breccia_mapper/static/css/masthead.css
+++ b/breccia_mapper/static/css/masthead.css
@@ -1,10 +1,10 @@
 header.masthead {
     position: relative;
     background: #343a40 no-repeat center;
-    -webkit-background-size: contain;
-    -moz-background-size: contain;
-    -o-background-size: contain;
-    background-size: contain;
+    -webkit-background-size: cover;
+    -moz-background-size: cover;
+    -o-background-size: cover;
+    background-size: cover;
     padding-top: 8rem;
     padding-bottom: 8rem;
     min-height: 400px;