diff --git a/pyproject.toml b/pyproject.toml
index a52ca3da3..873896bd1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,6 +27,7 @@ dependencies = [
     "requests",
     "dls-bluesky-core",  #requires ophyd-async
     "dls-dodal>=1.24.0",
+    "super-state-machine", # See GH issue 553
 ]
 dynamic = ["version"]
 license.file = "LICENSE"