diff --git a/gnu/packages/astronomy.scm b/gnu/packages/astronomy.scm
index a95f6c1dba..d8270e47b8 100644
--- a/gnu/packages/astronomy.scm
+++ b/gnu/packages/astronomy.scm
@@ -4096,13 +4096,13 @@ (define python-asdf-wcs-schemas
 (define-public python-gwcs
   (package
     (name "python-gwcs")
-    (version "0.19.0")
+    (version "0.20.0")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "gwcs" version))
        (sha256
-        (base32 "1f3h41aq4nwcl6k80jb9s8shn2mhvz32mx9qhcm1xmcqrflqyf52"))))
+        (base32 "1vhvs0mcwrw0128q9pd9v21wl173lspj5rvygqr19ljncralbx73"))))
     (build-system pyproject-build-system)
     (native-inputs
      (list python-jsonschema