diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 855ceaf..714e518 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.10]
+        python-version: "3.10"
         # os: [ubuntu-latest, macOS-latest, windows-latest]
         os: [ubuntu-latest]
 
diff --git a/pyproject.toml b/pyproject.toml
index c4d0e49..197cf62 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "floquet"
 version = "0.1.0"
-requires-python = ">=3.10"
+requires-python = ">=3.9"
 description = "Floquet simulations for identifying resonances in quantum systems."
 dependencies = [
     "numpy",