diff --git a/src/octoprint/server/util/sockjs.py b/src/octoprint/server/util/sockjs.py
index 6663834b..0554f346 100644
--- a/src/octoprint/server/util/sockjs.py
+++ b/src/octoprint/server/util/sockjs.py
@@ -12,6 +12,9 @@ import time
 
 import octoprint.timelapse
 import octoprint.server
+import octoprint.events
+import octoprint.plugin
+
 from octoprint.events import Events
 
 import octoprint.printer