diff --git a/gnu/packages/astronomy.scm b/gnu/packages/astronomy.scm
index fcc05d4e73..d450460551 100644
--- a/gnu/packages/astronomy.scm
+++ b/gnu/packages/astronomy.scm
@@ -3034,13 +3034,13 @@ (define python-asdf-wcs-schemas
 (define-public python-gwcs
   (package
     (name "python-gwcs")
-    (version "0.18.2")
+    (version "0.18.3")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "gwcs" version))
        (sha256
-        (base32 "0v9qcq6zl74d6s882s6xmas144jfalvll6va8rvrxmvpx4vqjzhg"))))
+        (base32 "0mgyk5mgmj242g8nl7glcj689vry3ncwf04b8q3hasjcc9bs0rm4"))))
     (build-system pyproject-build-system)
     (native-inputs
      (list python-jsonschema