diff --git a/meshview/web.py b/meshview/web.py
index eb32523..a8c6183 100644
--- a/meshview/web.py
+++ b/meshview/web.py
@@ -666,7 +666,7 @@ async def graph_power(request):
             {
                 'label': 'voltage',
                 'fields': ['voltage'],
-                'palette': 'Set2'
+                'palette': 'Set2',
             },
         ],
     )