diff --git a/setup.cfg b/setup.cfg
index 456e6a77c..bad37220d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -29,7 +29,7 @@ include_package_data = true
 python_requires = >=3.9
 setup_requires =
     cython>=0.25,<3.0
-    numpy>=1.15.0
+    numpy>=1.15.0,<2.0.0
     # We also need our Cython packages here to compile against 
     cymem>=2.0.2,<2.1.0
     preshed>=3.0.2,<3.1.0
@@ -47,7 +47,7 @@ install_requires =
     confection>=0.0.1,<1.0.0
     # Third-party dependencies
     setuptools
-    numpy>=1.19.0
+    numpy>=1.19.0,<2.0.0
     pydantic>=1.7.4,!=1.8,!=1.8.1,<3.0.0
     packaging>=20.0