diff --git a/gnu/packages/astronomy.scm b/gnu/packages/astronomy.scm
index 51dd065109..ec0ec25c20 100644
--- a/gnu/packages/astronomy.scm
+++ b/gnu/packages/astronomy.scm
@@ -5272,13 +5272,13 @@ default) to world coordinates.")
 (define-public python-rad
   (package
     (name "python-rad")
-    (version "0.20.0")
+    (version "0.21.0")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "rad" version))
        (sha256
-        (base32 "05b7qjhahzfjdp820m3qm69wrzb73njjqrzkk7hxkd8gbrbp0mj1"))))
+        (base32 "0b2gfsyccfx9dmmh725h7qjh5rxabg5w1j52yzfi8b0a8nmg6j6a"))))
     (build-system pyproject-build-system)
     (arguments
      (list