diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm
index f3fc131aaa..a45ccd6111 100644
--- a/gnu/packages/guile-xyz.scm
+++ b/gnu/packages/guile-xyz.scm
@@ -5491,7 +5491,7 @@ GitLab instance.")
 (define-public guile-smc
   (package
     (name "guile-smc")
-    (version "0.6.2")
+    (version "0.6.3")
     (source
      (origin
        (method git-fetch)
@@ -5501,7 +5501,7 @@ GitLab instance.")
        (file-name (string-append name "-" version))
        (sha256
         (base32
-         "11083lj048ab5zsdgwpkshxi8v5nfdr7kvmmslszbi7lq2pwfqig"))))
+         "1gjwz1l2ls4xkkgg4d2vw3a1klc4var03ab4k6lq1jifdvc8n51f"))))
     (build-system gnu-build-system)
     (arguments
      `(#:make-flags '("GUILE_AUTO_COMPILE=0")     ;to prevent guild warnings