diff --git a/beat/web/experiments/__init__.py b/beat/web/experiments/__init__.py
index b168e0d6250e467dd371da63c155f5dedfae6f57..f6a944674862a2ca7de1b7ce9a0bba2469f88a6f 100644
--- a/beat/web/experiments/__init__.py
+++ b/beat/web/experiments/__init__.py
@@ -25,4 +25,4 @@
 #                                                                             #
 ###############################################################################
 
-default_app_config = 'beat.web.experiments.apps.ExperimentsConfig'
+default_app_config = "beat.web.experiments.apps.ExperimentsConfig"