diff --git a/pyproject.toml b/pyproject.toml
index fed528d4a..8a6ababf3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,11 @@
 [build-system]
-requires = ["setuptools"]
+requires = [
+    "setuptools",
+    "wheel",
+    "cython>=0.25",
+    "cymem>=2.0.2,<2.1.0",
+    "preshed>=3.0.2,<3.1.0",
+    "murmurhash>=0.28.0,<1.1.0",
+    "thinc==7.4.0.dev0",
+]
 build-backend = "setuptools.build_meta"