diff --git a/SLE-12SP5.def b/SLE-12SP5.def
deleted file mode 100644
index dce6d49..0000000
--- a/SLE-12SP5.def
+++ /dev/null
@@ -1,40 +0,0 @@
-BootStrap: zypper
-OSVersion: 12.5
-Include: zypper
-Product: SLE-HPC/12.5/x86_64
-User: EMAIL
-Regcode: REGCODE
-Modules: \n\
-sle-module-hpc/12/x86_64,\n\
-sle-module-web-scripting/12/x86_64,\n\
-sle-module-legacy/12/x86_64,\n\
-sle-sdk/12.5/x86_64,\n\
-sle-module-toolchain/12/x86_64
-
-ProductPGP:\n\
-SLEpgp: -----BEGIN PGP PUBLIC KEY BLOCK-----\n\
-Version: rpm-4.11.2 (NSS-3)\n\
-\n\
-mQENBFEKlmsBCADbpZZbbSC5Zi+HxCR/ynYsVxU5JNNiSSZabN5GMgc9Z0hxeXxp\n\
-YWvFoE/4n0+IXIsp83iKvxf06Eu8je/DXp0lMqDZu7WiT3XXAlkOPSNV4akHTDoY\n\
-91SJaZCpgUJ7K1QXOPABNbREsAMN1a7rxBowjNjBUyiTJ2YuvQRLtGdK1kExsVma\n\
-hieh/QxpoDyYd5w/aky3z23erCoEd+OPfAqEHd5tQIa6LOosa63BSCEl3milJ7J9\n\
-vDmoGPAoS6ui7S2R5X4/+PLN8Mm2kOBrFjhmL93LX0mrGCMxsNsKgP6zabYKQEb8\n\
-L028SXvl7EGoA+Vw5Vd3wIGbM73PfbgNrXjfABEBAAG0KFN1U0UgUGFja2FnZSBT\n\
-aWduaW5nIEtleSA8YnVpbGRAc3VzZS5kZT6JATwEEwECACYCGwMGCwkIBwMCBBUC\n\
-CAMEFgIDAQIeAQIXgAUCWEfrHwUJDsIitAAKCRBwr56BOdt8gpqUB/wPSSS5BcDu\n\
-Oi4n02cj4Hdt7WITKBjjo0lG1fXG1ppx1wOST+s8FertMVFY53TW6FGjcYtwVOIq\n\
-rsMYiV6kf1NxUV/jcAy7VmC5EZnO0R/D3sT4Oh5hsLtERauZolK5BZmd0S51Qa8e\n\
-TxZ5mX9PL2i3s/ShETc30drf83ugc7B4yZPNQWXNDPgGcC+hEeC5qw48RzHYIpUt\n\
-RzHmefR5Z3ioTUbDlzy+SGP2uA7mhR4Lfk/df5fYxWfCoKlyGjtrvA65cB+Pksyn\n\
-xrAeBuB+vBM+KnDrxW2Sn4AbWkzH//dfz9OJDJu4UM91hb7qxM0OkrXHQV3iNqzg\n\
-MDEhky/9NqMy\n\
-=GdP5\n\
------END PGP PUBLIC KEY BLOCK-----
-
-
-
-%post
-    ln -s /etc/products.d/SLE-HPC.prod /etc/products.d/baseproduct
-    echo "Hello from post boot strap"
-    zypper install -y vim
diff --git a/SLE-15SP5.def b/SLE-15SP6.def
similarity index 90%
rename from SLE-15SP5.def
rename to SLE-15SP6.def
index f77c908..181a8ff 100644
--- a/SLE-15SP5.def
+++ b/SLE-15SP6.def
@@ -1,10 +1,10 @@
 BootStrap: zypper
-OSVersion: 15.5
+OSVersion: 15.6
 Include: zypper
-Product: SLES/15.5/x86_64
+Product: SLES/15.6/x86_64
 User: EMAIL
 Regcode: REGCODE
-MirrorURL: https://updates.suse.com/SUSE/Products/SLE-BCI/15-SP3/x86_64/product/
+MirrorURL: https://updates.suse.com/SUSE/Products/SLE-BCI/15-SP6/x86_64/product/
 # Just base modules here, other modules are installed in post
 Modules: \n\
 sle-module-basesystem,\n\
@@ -34,6 +34,6 @@ MDEhky/9NqMy\n\
 
 
 %post
-    update-ca-certificates 
+    update-ca-certificates
     echo "Hello from post boot strap"
     zypper in -y vim
diff --git a/apptainer-1.2.3.tar.gz b/apptainer-1.2.3.tar.gz
deleted file mode 100644
index ebae1bf..0000000
--- a/apptainer-1.2.3.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e1e55aa1d688f9f485f247ca1a568707f275bf0c55400d049e88ade920ddaa8b
-size 5060807
diff --git a/apptainer-1.2.5.tar.gz b/apptainer-1.2.5.tar.gz
new file mode 100644
index 0000000..b13544e
--- /dev/null
+++ b/apptainer-1.2.5.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9daebdd688cfcf646d87c0c1cc5f3f4eb274aceb9e3483e58e53da293cc4f310
+size 5061186
diff --git a/apptainer.changes b/apptainer.changes
index abe5861..c15ac9f 100644
--- a/apptainer.changes
+++ b/apptainer.changes
@@ -1,3 +1,33 @@
+-------------------------------------------------------------------
+Wed Jan 31 14:14:20 UTC 2024 - Egbert Eich <eich@suse.com>
+
+- Updated apptainer to version 1.2.5
+  * Added `libnvidia-nvvm` to `nvliblist.conf`. Newer NVIDIA
+    Drivers (known with >= 525.85.05) require this lib to compile
+    OpenCL programs against NVIDIA GPUs, i.e. `libnvidia-opencl`
+    depends on `libnvidia-nvvm`.
+  * Disable the usage of cgroup in instance creation when
+    `--fakeroot` is passed.
+  * Disable the usage of cgroup in instance creation when `hidepid`
+    mount option on `/proc` is set.
+  * Fixed a regression introduced in 1.2.0 where the user's
+    password file information was not copied in to the container
+    when there was a parent root-mapped user namespace (as is the
+    case for example in `cvmfsexec`).
+  * Added the upcoming NVIDIA driver library `libnvidia-gpucomp.so`
+    to the list of libraries to add to NVIDIA GPU-enabled
+    containers. Fixed missing error handling during the creation
+    of an encrypted image that lead to the generation of corrupted
+    images.
+  * Use `APPTAINER_TMPDIR` for temporary files during privileged
+    image encryption.
+  * If rootless unified cgroups v2 is available when starting an
+    image but `XDG_RUNTIME_DIR` or `DBUS_SESSION_BUS_ADDRESS` is
+    not set, print an info message that stats will not be available
+    instead of exiting with a fatal error.
+  * Allow templated build arguments to definition files to have
+    empty values.
+
 -------------------------------------------------------------------
 Tue Oct 24 06:02:44 UTC 2023 - Egbert Eich <eich@suse.com>
 
diff --git a/apptainer.spec b/apptainer.spec
index 4c683a0..488ed42 100644
--- a/apptainer.spec
+++ b/apptainer.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package apptainer
 #
-# Copyright (c) 2023 SUSE LLC
+# Copyright (c) 2024 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -25,7 +25,7 @@ Summary:        Application and environment virtualization
 License:        BSD-3-Clause-LBNL AND OpenSSL
 Group:          Productivity/Clustering/Computing
 Name:           apptainer
-Version:        1.2.3
+Version:        1.2.5
 Release:        0
 # https://spdx.org/licenses/BSD-3-Clause-LBNL.html
 URL:            https://apptainer.org
@@ -35,12 +35,11 @@ Conflicts:      singularity-ce
 Conflicts:      singularity-runtime
 Source0:        https://github.com/apptainer/apptainer/archive/v%{version}%{?vers_suffix}/apptainer-%{version}%{?vers_suffix}.tar.gz
 Source1:        README.SUSE
-Source2:        SLE-12SP5.def
-Source3:        SLE-15SP5.def
-Source4:        SLE.def
-Source5:        leap.def
-Source8:        %{name}-rpmlintrc
-Source9:        vendor.tar.gz
+Source2:        SLE-15SP6.def
+Source3:        SLE.def
+Source4:        leap.def
+Source20:       %{name}-rpmlintrc
+Source21:       vendor.tar.gz
 BuildRequires:  cryptsetup
 BuildRequires:  fdupes
 BuildRequires:  gcc
@@ -71,7 +70,7 @@ containers that can be used across host environments.
 
 %prep
 %setup -q -n %{name}-%{version}%{?vers_suffix}
-cp %{S:1} %{S:2} %{S:3} %{S:4} %{S:5} .
+cp %{S:1} %{S:2} %{S:3} %{S:4} .
 
 %build
 
@@ -79,7 +78,7 @@ cp %{S:1} %{S:2} %{S:3} %{S:4} %{S:5} .
 echo %version > VERSION
 # Not all of these parameters currently have an effect, but they might be
 # used someday.  They are the same parameters as in the configure macro.
-tar xzf %{S:9}
+tar xzf %{S:21}
 ./mconfig -V %{version}-%{release} \
         -P release \
         --prefix=%{_prefix} \