diff --git a/theme.css b/theme.css
index 4f6e2fb..88683e4 100644
--- a/theme.css
+++ b/theme.css
@@ -15,7 +15,7 @@
 }
 
 .board {
-  flex-wrap: row wrap;
+  flex-wrap: wrap;
 }
 
 .board-column:first-child {