diff --git a/requirements.txt b/requirements.txt
index 6ae078abe..6963bc407 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 pip>=22.1.0
 setuptools>=64.0,<69.0
 wheel
-numpy>=1.21.0,<2.0.0
+numpy~=1.0
 Cython>3,!=3.0.4
 pandas >=1.1.5, <=2.2.0
 xarray