diff --git a/setup.cfg b/setup.cfg
index 8bce8cff2..41172a339 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -31,14 +31,6 @@ project_urls =
 zip_safe = false
 include_package_data = true
 python_requires = >=3.6
-setup_requires =
-    cython>=0.25,<3.0
-    numpy>=1.15.0
-    # We also need our Cython packages here to compile against
-    cymem>=2.0.2,<2.1.0
-    preshed>=3.0.2,<3.1.0
-    murmurhash>=0.28.0,<1.1.0
-    thinc>=8.1.0,<8.2.0
 install_requires =
     # Our libraries
     spacy-legacy>=3.0.9,<3.1.0
diff --git a/spacy/tests/package/test_requirements.py b/spacy/tests/package/test_requirements.py
index c0b9d4dc6..4e2a1c7e7 100644
--- a/spacy/tests/package/test_requirements.py
+++ b/spacy/tests/package/test_requirements.py
@@ -4,8 +4,8 @@ from pathlib import Path
 
 def test_build_dependencies():
     # Check that library requirements are pinned exactly the same across different setup files.
-    # TODO: correct checks for numpy rather than ignoring
     libs_ignore_requirements = [
+        "cython",
         "pytest",
         "pytest-timeout",
         "mock",