diff --git a/pyproject.toml b/pyproject.toml
index 020dd2d..5f79d66 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -81,7 +81,7 @@ addopts = "-rsx --tb=short"
 testpaths = ["tests"]
 
 [tool.mypy]
-python_version = "3.7"
+python_version = "3.8"
 
 [tool.coverage.run]
 source = ["asphalt.sqlalchemy"]