diff --git a/beat/web/backend/views.py b/beat/web/backend/views.py
index 10a7d8064a3b9daac234592af7264ba379dade1a..dde215fb781e8091d51799cae49c4a8b4527dfae 100644
--- a/beat/web/backend/views.py
+++ b/beat/web/backend/views.py
@@ -53,8 +53,8 @@ def scheduler(request):
     response = scheduler_api(request)
 
     if response.status_code != 200:
-        messages.error(request, "Error contacting the scheduler at %s:%d " \
-                "[%s/%d] %s" % (settings.SCHEDULER_ADDRESS,
+        messages.error(request, "Error contacting the scheduler at {}:{} " \
+                "[{}/{}] {}".format(settings.SCHEDULER_ADDRESS,
                     settings.SCHEDULER_PORT, response.status_text,
                     response.status_code, response.data))
         return render_to_response('backend/scheduler.html', dict(),