diff --git a/pyproject.toml b/pyproject.toml
index 33bd9c4..54a6192 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,5 +32,5 @@ cffi = "^1.14.2"
 pytest = "^6.0.1"
 
 [build-system]
-requires = ["poetry>=0.12"]
+requires = ["setuptools", "poetry>=0.12"]
 build-backend = "poetry.masonry.api"