diff --git a/README.md b/README.md
index 7d07856..6496e53 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ API and is not supported by this package.
 ## Install for one seat
 
 Install the Python commands and the OpenCode plugin from this repository. The
-Python package requires `musubi-harness>=1.7.1` because that release adds
+Python package requires `musubi-harness>=1.8.0` because that release adds
 `opencode` as a distinct provenance source.
 
 ```sh
diff --git a/pyproject.toml b/pyproject.toml
index 8c97e8b..5d264d3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ readme = "README.md"
 requires-python = ">=3.12"
 license = "Apache-2.0"
 authors = [{ name = "Eric Mey", email = "ericmey@gmail.com" }]
-dependencies = ["musubi-harness>=1.7.1,<2"]
+dependencies = ["musubi-harness>=1.8.0,<2"]
 
 [project.optional-dependencies]
 dev = ["pytest>=8", "ruff>=0.12", "mypy>=1.15"]