diff --git a/pyproject.toml b/pyproject.toml
index 877d6fd..df1e6a7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ include = [
 ]
 
 [tool.poetry.dependencies]
-python = "^3.9"
+python = "^3.6"
 GitPython = "^3.1.13"
 mitama = "^4.3.3"
 docker = "^4.4.4"