diff --git a/gmic.changes b/gmic.changes
index 9cbf133..43bb664 100644
--- a/gmic.changes
+++ b/gmic.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Jan 10 21:43:55 UTC 2025 - Christophe Marin <christophe@krop.fr>
+
+- Use GCC 13 on Leap 15
+
 -------------------------------------------------------------------
 Wed Jan  8 13:06:49 UTC 2025 - Marcus Rueckert <mrueckert@suse.de>
 
diff --git a/gmic.spec b/gmic.spec
index 2c30edb..0198c16 100644
--- a/gmic.spec
+++ b/gmic.spec
@@ -63,10 +63,15 @@ BuildRequires:  krita
 #
 # /SECTION
 #
-BuildRequires:  cmake >= 3.14.0
+BuildRequires:  cmake >= 3.16.0
 BuildRequires:  dos2unix
 BuildRequires:  extra-cmake-modules
 BuildRequires:  fftw3-threads-devel
+%if 0%{?suse_version} == 1500
+# Qt 6 requires c++-17, we'll use the latest version available on Leap 15
+BuildRequires:  gcc13-c++
+BuildRequires:  gcc13-PIE
+%endif
 BuildRequires:  hicolor-icon-theme
 BuildRequires:  pkgconfig
 BuildRequires:  update-desktop-files
@@ -171,6 +176,10 @@ This package contains shared data files for the various gmic frontends.
 dos2unix src/gmic_libc.*
 
 %build
+%if 0%{?suse_version} == 1500
+export CC=gcc-13 CXX=g++-13
+%endif
+
 # Build gmic
 # Starting with gmic 3.1.0, the gmic dev replaced their CMake build system with a non-configurable Makefile...
 sed -i 's#LIB ?= lib#LIB ?= %{_lib}#' src/Makefile