diff --git a/cloud/bmaas/bmdb/webug/templates/base.gohtml b/cloud/bmaas/bmdb/webug/templates/base.gohtml
index c1ab4e2..fef098d 100644
--- a/cloud/bmaas/bmdb/webug/templates/base.gohtml
+++ b/cloud/bmaas/bmdb/webug/templates/base.gohtml
@@ -83,6 +83,7 @@
     }
     .mono {
         font-family: monospace;
+        tab-size: 2;
     }
     .error {
         color: #f00;