diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 28dfb04..688f22e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
diff --git a/pyproject.toml b/pyproject.toml
index d0f03a4..acea5df 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "rednose"
-requires-python = ">= 3.8"
+requires-python = ">= 3.9"
 version = "0.1.0"
 
 dependencies = [
@@ -27,7 +27,7 @@ build-backend = "setuptools.build_meta"
 
 [tool.ruff]
 line-length = 160
-target-version="py311"
+target-version="py39"
 
 [tool.ruff.lint]
 select = ["E", "F", "W", "PIE", "C4", "ISC", "RUF100", "A"]