diff --git a/libfltk.spec b/libfltk.spec
index 7e4fef6..627ff3f 100644
--- a/libfltk.spec
+++ b/libfltk.spec
@@ -1,7 +1,7 @@
 %define pkgver %(echo %version | tr _ -)
 %define dirver %(echo %version | cut -d_ -f1)
 Name:          libfltk
-Version:       1.3.8
+Version:       1.3.9
 Release:       1mamba
 Summary:       A cross-platform C++ GUI toolkit
 Group:         System/Libraries
@@ -15,7 +15,6 @@ Patch1:        libfltk-1.3.3-font_missing_export.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: libGLU-devel
 BuildRequires: libX11-devel
 BuildRequires: libXcursor-devel
 BuildRequires: libXext-devel
@@ -25,6 +24,7 @@ BuildRequires: libXinerama-devel
 BuildRequires: libXrender-devel
 BuildRequires: libfontconfig-devel
 BuildRequires: libgcc
+BuildRequires: libglu-devel
 BuildRequires: libglvnd-devel
 BuildRequires: libjpeg-devel
 BuildRequires: libpng-devel
@@ -138,6 +138,9 @@ This package contains the Checkers and Sudoku FLTK games.
 #%{_mandir}/man6/checkers.*
 
 %changelog
+* Mon Dec 11 2023 Automatic Build System <autodist@mambasoft.it> 1.3.9-1mamba
+- automatic version update by autodist
+
 * Sun Nov 21 2021 Automatic Build System <autodist@mambasoft.it> 1.3.8-1mamba
 - automatic version update by autodist