diff --git a/gnu/packages/pdf.scm b/gnu/packages/pdf.scm
index a767538eaa..a2c0118455 100644
--- a/gnu/packages/pdf.scm
+++ b/gnu/packages/pdf.scm
@@ -824,14 +824,14 @@ (define-public python-pydyf
 (define-public mupdf
   (package
     (name "mupdf")
-    (version "1.23.3")
+    (version "1.23.4")
     (source
      (origin
        (method url-fetch)
        (uri (string-append "https://mupdf.com/downloads/archive/"
-                           "mupdf-" version "-source.tar.gz"))
+                           "mupdf-" version "-source.tar.lz"))
        (sha256
-        (base32 "1b8ajj5xmi2p9c92l8fd46amfshmxdw6zcg1hqajg8y0kd0ady8y"))
+        (base32 "0068swdrlq9q7pkg3dxn4rschxm5j37pd4vz0cb2pcry75rdmxpc"))
        (modules '((guix build utils)
                   (ice-9 ftw)
                   (srfi srfi-1)))