diff --git a/hmm.json b/hmm.json
index 5b561a2c..1e9b972a 100644
--- a/hmm.json
+++ b/hmm.json
@@ -8,7 +8,7 @@
     {
       "name": "openfl",
       "type": "haxelib",
-      "version": null
+      "version": "9.2.1"
     },
     {
       "name": "flixel",
diff --git a/source/game/states/PlayState.hx b/source/game/states/PlayState.hx
index 38b6136a..24560872 100644
--- a/source/game/states/PlayState.hx
+++ b/source/game/states/PlayState.hx
@@ -56,6 +56,7 @@ import flixel.util.FlxSort;
 import flixel.util.FlxStringUtil;
 import flixel.util.FlxTimer;
 import haxe.Json;
+import backend.system.MusicBeatSubstate;
 import lime.utils.Assets;
 import openfl.Lib;
 import openfl.display.BlendMode;