diff --git a/mupdf-1.23.3-source.tar.lz b/mupdf-1.23.4-source.tar.lz
similarity index 77%
rename from mupdf-1.23.3-source.tar.lz
rename to mupdf-1.23.4-source.tar.lz
index 4167778..e1969ed 100644
Binary files a/mupdf-1.23.3-source.tar.lz and b/mupdf-1.23.4-source.tar.lz differ
diff --git a/mupdf.spec b/mupdf.spec
index ada88fc..f2306c8 100644
--- a/mupdf.spec
+++ b/mupdf.spec
@@ -1,5 +1,5 @@
 Name:          mupdf
-Version:       1.23.3
+Version:       1.23.4
 Release:       1mamba
 Summary:       A lightweight PDF, XPS, and E-book viewer
 Group:         Graphical Desktop/Applications/Publishing
@@ -85,6 +85,9 @@ This package contains libraries and header files for developing applications tha
 
 
 %changelog
+* Wed Oct 11 2023 Automatic Build System <autodist@mambasoft.it> 1.23.4-1mamba
+- automatic version update by autodist
+
 * Tue Sep 05 2023 Automatic Build System <autodist@mambasoft.it> 1.23.3-1mamba
 - automatic version update by autodist