diff --git a/gnu/packages/guile.scm b/gnu/packages/guile.scm
index 2c83f56f40..5349fda081 100644
--- a/gnu/packages/guile.scm
+++ b/gnu/packages/guile.scm
@@ -449,14 +449,14 @@ for Guile\".")
 (define-public guile-json
   (package
     (name "guile-json")
-    (version "0.4.0")
+    (version "0.5.0")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://savannah/guile-json/guile-json-"
                                  version ".tar.gz"))
              (sha256
               (base32
-               "0v06272rw4ycwzssjf3fzpk2vhpslvl55hz94q80vc6f74j0d5h6"))
+               "0l8a34l92nrdszy7ykycfvr8y0n0yi5qb3ccliycvpvf9mzk5n8d"))
              (modules '((guix build utils)))
              (snippet
               ;; Make sure everything goes under .../site/2.0, like Guile's