diff --git a/light9/effect/sequencer/sequencer.py b/light9/effect/sequencer/sequencer.py
--- a/light9/effect/sequencer/sequencer.py
+++ b/light9/effect/sequencer/sequencer.py
@@ -3,7 +3,7 @@ copies from effectloop.py, which this sh
 '''
 
 import asyncio
-import imp
+import importlib
 import logging
 import time
 import traceback
@@ -47,7 +47,7 @@ class CodeWatcher:
 
         def go():
             log.info("reload effecteval")
-            imp.reload(effecteval)
+            importlib.reload(effecteval)
             self.onChange()
 
         # in case we got an event at the start of the write