diff --git a/cynthion/python/pyproject.toml b/cynthion/python/pyproject.toml
index b5094597..0e9c96a6 100644
--- a/cynthion/python/pyproject.toml
+++ b/cynthion/python/pyproject.toml
@@ -42,7 +42,7 @@ dependencies = [
     "tqdm",
     "pygreat~=2024.0",
     "apollo_fpga~=1.1",
-    "amaranth==0.4.1",
+    "amaranth~=0.5",
     "luna-usb~=0.1",
     "luna-soc~=0.2",
 ]