diff --git a/app/models/kairos.rb b/app/models/kairos.rb
index c0826eee..e7d41740 100644
--- a/app/models/kairos.rb
+++ b/app/models/kairos.rb
@@ -58,7 +58,7 @@ def self.query params
           }
         }
       ]
-    }]
+    }.compact]
 
     data = { metrics: metrics, cache_time: 0 }