diff --git a/pyproject.toml b/pyproject.toml
index 7021cda..c3bfa7f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ dependencies = [
   "pyvcd",
 ]
 
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 
 [project.optional-dependencies]
 dev = [