diff --git a/pyproject.toml b/pyproject.toml
index c74a59cf1..9abf16845 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,2 +1,2 @@
 [build-system]
-requires = ["setuptools", "setuptools_scm", "wheel", "scikit-build", "cmake", "conan<2"]
+requires = ["setuptools", "setuptools_scm", "wheel", "scikit-build", "cmake", "conan<2", "ninja"]