diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm
index 32c6d9c098..cdeb0006ca 100644
--- a/gnu/packages/guile-xyz.scm
+++ b/gnu/packages/guile-xyz.scm
@@ -886,8 +886,8 @@ Vicare Scheme and IronScheme.  Right now it contains:
     (license license:bsd-3)))
 
 (define-public guile-prometheus
-  (let ((commit "12d3d9de676f518eccf0a384d461cc4c035939b0")
-        (revision "2"))
+  (let ((commit "2549c482fb04db84481d595f0bf99a1c8bb97c4c")
+        (revision "3"))
     (package
     (name "guile-prometheus")
     (version (git-version "0" revision commit))
@@ -898,7 +898,7 @@ Vicare Scheme and IronScheme.  Right now it contains:
                     (commit commit)))
               (sha256
                (base32
-                "0d45g2719xy84l2si5h1fw7vlig4pqqkhp5zlw9dlr5gzaa3yrrs"))
+                "0wfaspy3gvn2bkfzlvgx9ncz6114ldxxj25vnj4frcgbzqbdsair"))
               (file-name (string-append name "-" version "-checkout"))))
     (build-system gnu-build-system)
     (native-inputs