diff --git a/setup.py b/setup.py
index a5e01de6..c5ba9ede 100755
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@ def c_includes(parent, depth=1):
     use_scm_version={'write_to': 'calcos/version.py'},
     setup_requires=['setuptools_scm'],
     install_requires=[
-        'astropy',
+        'astropy>=5.0.4',
         'numpy',
         'scipy',
         'stsci.tools',