--- a/mod_log_json/mod_log_json.lua	Sat Nov 23 04:52:43 2019 +0100
+++ b/mod_log_json/mod_log_json.lua	Sat Nov 23 04:53:16 2019 +0100
@@ -42,4 +42,9 @@
 	end
 end
 
+function module.unload()
+	-- deregister
+	require"core.loggingmanager".register_sink_type("json", nil);
+end
+
 require"core.loggingmanager".register_sink_type("json", sink_maker);