diff --git a/var/spack/repos/builtin/packages/py-numpy/package.py b/var/spack/repos/builtin/packages/py-numpy/package.py
index a808922850..afdcfa74d3 100644
--- a/var/spack/repos/builtin/packages/py-numpy/package.py
+++ b/var/spack/repos/builtin/packages/py-numpy/package.py
@@ -23,7 +23,7 @@ class PyNumpy(PythonPackage):
     maintainers = ['adamjstewart']
 
     version('main', branch='main')
-    version('master', branch='main', deprecated=True)
+    version('1.21.4', sha256='e6c76a87633aa3fa16614b61ccedfae45b91df2767cf097aa9c933932a7ed1e0')
     version('1.21.3', sha256='63571bb7897a584ca3249c86dd01c10bcb5fe4296e3568b2e9c1a55356b6410e')
     version('1.21.2', sha256='423216d8afc5923b15df86037c6053bf030d15cc9e3224206ef868c2d63dd6dc')
     version('1.21.1', sha256='dff4af63638afcc57a3dfb9e4b26d434a7a602d225b42d746ea7fe2edf1342fd')