setup: relax dependency on amaranth.

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index 356c652..724e5c4 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@ setup(
     license="BSD",
     setup_requires=["wheel", "setuptools", "setuptools_scm"],
     install_requires=[
-        "amaranth>=0.2,<0.4",
+        "amaranth>=0.2,<0.5",
         "importlib_metadata; python_version<'3.8'",
     ],
     packages=find_packages(),