diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 076f72f..5a48f62 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -22,6 +22,7 @@ jobs:
         - 'pypy-3.10'
         # this version range needs to be synchronized with the one in pyproject.toml
         amaranth-version:
+        - '0.5'
         - 'git'
         allow-failure:
           - false
diff --git a/pyproject.toml b/pyproject.toml
index 22d910f..761e9ac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ license = {file = "LICENSE.txt"}
 requires-python = "~=3.8"
 dependencies = [
   # this version requirement needs to be synchronized with the one in .github/workflows/main.yml
-  "amaranth@git+https://github.com/amaranth-lang/amaranth",
+  "amaranth>=0.5,<0.6",
 ]
 
 [project.urls]