diff --git a/pyproject.toml b/pyproject.toml
index 1931533..c5d11a9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ classifiers = [
     "License :: OSI Approved :: Apache Software License",
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.6"
 license = { "text" = "Apache Software License" }
 dependencies = [
     "cffi",