diff --git a/setup.py b/setup.py
index 5816ba2aa..7797f3d54 100755
--- a/setup.py
+++ b/setup.py
@@ -425,7 +425,7 @@ def get_mupdf_internal(out, location=None, sha=None, local_tgz=None):
     log(f'get_mupdf_internal(): {out=} {location=} {sha=}')
     assert out in ('dir', 'tgz')
     if location is None:
-        location = 'https://mupdf.com/downloads/archive/mupdf-1.24.10-source.tar.gz'
+        location = f'https://mupdf.com/downloads/archive/mupdf-{version_b}-source.tar.gz'
         #location = 'git:--branch master https://github.com/ArtifexSoftware/mupdf.git'
     
     if location == '':