diff --git a/pyproject.toml b/pyproject.toml
index 712bf5753a..f9a984b09d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ dependencies = [
     "soundfile",
     "imageio",
     "imageio-ffmpeg",
-    "psychtoolbox",
+    "psychtoolbox; platform_machine!='arm64'",
     # for iohub
     "pywinhook; platform_system == \"Windows\"",
     "gevent",