diff --git a/CMakeLists.txt b/CMakeLists.txt
index 78f1ceafe..569bef6ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -203,7 +203,7 @@ if("${DDC_BUILD_KERNELS_SPLINES}")
     )
     if("${DDC_KokkosKernels_DEPENDENCY_POLICY}" STREQUAL "AUTO")
         if(NOT TARGET Kokkos::kokkoskernels)
-            find_package(KokkosKernels QUIET)
+            find_package(KokkosKernels 4.5...<5 QUIET)
             if(NOT KokkosKernels_FOUND)
                 ddc_configure_kokkos_kernels()
             endif()
@@ -211,7 +211,7 @@ if("${DDC_BUILD_KERNELS_SPLINES}")
     elseif("${DDC_KokkosKernels_DEPENDENCY_POLICY}" STREQUAL "EMBEDDED")
         ddc_configure_kokkos_kernels()
     elseif("${DDC_KokkosKernels_DEPENDENCY_POLICY}" STREQUAL "INSTALLED")
-        find_package(KokkosKernels REQUIRED)
+        find_package(KokkosKernels 4.5...<5 REQUIRED)
     endif()
 
     add_library(ddc_splines INTERFACE)
diff --git a/cmake/DDCConfig.cmake.in b/cmake/DDCConfig.cmake.in
index beaa15f5f..64bca6fa1 100644
--- a/cmake/DDCConfig.cmake.in
+++ b/cmake/DDCConfig.cmake.in
@@ -28,7 +28,7 @@ if(@DDC_BUILD_KERNELS_SPLINES@)
    list(PREPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR})
    ddc_find_dependency(LAPACKE)
    list(POP_FRONT CMAKE_MODULE_PATH)
-   ddc_find_dependency(KokkosKernels)
+   ddc_find_dependency(KokkosKernels 4.5...<5)
 endif()
 
 if(@DDC_BUILD_PDI_WRAPPER@)
diff --git a/docs/CMakeLists.txt b/docs/CMakeLists.txt
index 21f8a9648..d0eebe5cf 100644
--- a/docs/CMakeLists.txt
+++ b/docs/CMakeLists.txt
@@ -21,7 +21,7 @@ set(DOXYGEN_EXAMPLE_PATH "${DDC_SOURCE_DIR}/examples")
 set(DOXYGEN_EXPAND_ONLY_PREDEF YES)
 set(DOXYGEN_EXTRACT_ALL YES CACHE STRING "")
 set(DOXYGEN_EXCLUDE_SYMBOLS "detail")
-set(DOXYGEN_EXCLUDE_PATTERNS "*/experimental/*;*/detail/*")
+set(DOXYGEN_EXCLUDE_PATTERNS "*/detail/*;*/experimental/*;*/kokkos-kernels-ext/*")
 set(DOXYGEN_EXTRACT_LOCAL_CLASSES YES)
 set(DOXYGEN_FULL_PATH_NAMES NO)
 set(DOXYGEN_HTML_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/html")
diff --git a/include/ddc/kernels/splines/KokkosBatched_Gbtrs.hpp b/include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Gbtrs.hpp
similarity index 77%
rename from include/ddc/kernels/splines/KokkosBatched_Gbtrs.hpp
rename to include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Gbtrs.hpp
index b9c1d099b..d1c1c6d31 100644
--- a/include/ddc/kernels/splines/KokkosBatched_Gbtrs.hpp
+++ b/include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Gbtrs.hpp
@@ -1,18 +1,10 @@
-//@HEADER
-// ************************************************************************
+// Copyright (C) The DDC development team, see COPYRIGHT.md file
 //
-//                        Kokkos v. 4.0
-//       Copyright (2022) National Technology & Engineering
-//               Solutions of Sandia, LLC (NTESS).
-//
-// Under the terms of Contract DE-NA0003525 with NTESS,
-// the U.S. Government retains certain rights in this software.
-//
-// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
-// See https://kokkos.org/LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//@HEADER
+// SPDX-License-Identifier: MIT
+
+// clang-format off
+// NOLINTBEGIN(*)
+
 #ifndef KOKKOSBATCHED_GBTRS_HPP_
 #define KOKKOSBATCHED_GBTRS_HPP_
 
@@ -62,3 +54,6 @@ struct SerialGbtrs {
 #include "KokkosBatched_Gbtrs_Serial_Impl.hpp"
 
 #endif  // KOKKOSBATCHED_GBTRS_HPP_
+
+// NOLINTEND(*)
+// clang-format on
diff --git a/include/ddc/kernels/splines/KokkosBatched_Gbtrs_Serial_Impl.hpp b/include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Gbtrs_Serial_Impl.hpp
similarity index 90%
rename from include/ddc/kernels/splines/KokkosBatched_Gbtrs_Serial_Impl.hpp
rename to include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Gbtrs_Serial_Impl.hpp
index f7f7f9d65..2625434f1 100644
--- a/include/ddc/kernels/splines/KokkosBatched_Gbtrs_Serial_Impl.hpp
+++ b/include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Gbtrs_Serial_Impl.hpp
@@ -1,18 +1,9 @@
-//@HEADER
-// ************************************************************************
+// Copyright (C) The DDC development team, see COPYRIGHT.md file
 //
-//                        Kokkos v. 4.0
-//       Copyright (2022) National Technology & Engineering
-//               Solutions of Sandia, LLC (NTESS).
-//
-// Under the terms of Contract DE-NA0003525 with NTESS,
-// the U.S. Government retains certain rights in this software.
-//
-// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
-// See https://kokkos.org/LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//@HEADER
+// SPDX-License-Identifier: MIT
+
+// clang-format off
+// NOLINTBEGIN(*)
 
 #ifndef KOKKOSBATCHED_GBTRS_SERIAL_IMPL_HPP_
 #define KOKKOSBATCHED_GBTRS_SERIAL_IMPL_HPP_
@@ -174,3 +165,6 @@ struct SerialGbtrs<Trans::Transpose, Algo::Level3::Unblocked> {
 }  // namespace KokkosBatched
 
 #endif  // KOKKOSBATCHED_GBTRS_SERIAL_IMPL_HPP_
+
+// NOLINTEND(*)
+// clang-format on
diff --git a/include/ddc/kernels/splines/KokkosBatched_Getrs.hpp b/include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Getrs.hpp
similarity index 70%
rename from include/ddc/kernels/splines/KokkosBatched_Getrs.hpp
rename to include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Getrs.hpp
index 895492b27..633b90b8a 100644
--- a/include/ddc/kernels/splines/KokkosBatched_Getrs.hpp
+++ b/include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Getrs.hpp
@@ -1,18 +1,10 @@
-//@HEADER
-// ************************************************************************
+// Copyright (C) The DDC development team, see COPYRIGHT.md file
 //
-//                        Kokkos v. 4.0
-//       Copyright (2022) National Technology & Engineering
-//               Solutions of Sandia, LLC (NTESS).
-//
-// Under the terms of Contract DE-NA0003525 with NTESS,
-// the U.S. Government retains certain rights in this software.
-//
-// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
-// See https://kokkos.org/LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//@HEADER
+// SPDX-License-Identifier: MIT
+
+// clang-format off
+// NOLINTBEGIN(*)
+
 #ifndef KOKKOSBATCHED_GETRS_HPP_
 #define KOKKOSBATCHED_GETRS_HPP_
 
@@ -51,3 +43,6 @@ struct SerialGetrs {
 #include "KokkosBatched_Getrs_Serial_Impl.hpp"
 
 #endif  // KOKKOSBATCHED_GETRS_HPP_
+
+// NOLINTEND(*)
+// clang-format on
diff --git a/include/ddc/kernels/splines/KokkosBatched_Getrs_Serial_Impl.hpp b/include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Getrs_Serial_Impl.hpp
similarity index 75%
rename from include/ddc/kernels/splines/KokkosBatched_Getrs_Serial_Impl.hpp
rename to include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Getrs_Serial_Impl.hpp
index e471e9ebd..4840c1280 100644
--- a/include/ddc/kernels/splines/KokkosBatched_Getrs_Serial_Impl.hpp
+++ b/include/ddc/kernels/splines/kokkos-kernels-ext/KokkosBatched_Getrs_Serial_Impl.hpp
@@ -1,18 +1,9 @@
-//@HEADER
-// ************************************************************************
+// Copyright (C) The DDC development team, see COPYRIGHT.md file
 //
-//                        Kokkos v. 4.0
-//       Copyright (2022) National Technology & Engineering
-//               Solutions of Sandia, LLC (NTESS).
-//
-// Under the terms of Contract DE-NA0003525 with NTESS,
-// the U.S. Government retains certain rights in this software.
-//
-// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
-// See https://kokkos.org/LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//@HEADER
+// SPDX-License-Identifier: MIT
+
+// clang-format off
+// NOLINTBEGIN(*)
 
 #ifndef KOKKOSBATCHED_GETRS_SERIAL_IMPL_HPP_
 #define KOKKOSBATCHED_GETRS_SERIAL_IMPL_HPP_
@@ -69,8 +60,8 @@ struct SerialGetrs<Trans::NoTranspose, Algo::Level3::Unblocked> {
 
     [[maybe_unused]] auto info_laswp = KokkosBatched::SerialLaswp<Direct::Forward>::invoke(piv, b);
 
-    auto info_trsm = KokkosBatched::SerialTrsm<Side::Left, Uplo::Lower, Trans::NoTranspose, Diag::Unit,
-                                               Algo::Trsm::Unblocked>::invoke(1.0, A, b);
+    [[maybe_unused]] auto info_trsm = KokkosBatched::SerialTrsm<Side::Left, Uplo::Lower, Trans::NoTranspose, Diag::Unit,
+                                                                Algo::Trsm::Unblocked>::invoke(1.0, A, b);
     info_trsm      = KokkosBatched::SerialTrsm<Side::Left, Uplo::Upper, Trans::NoTranspose, Diag::NonUnit,
                                           Algo::Trsm::Unblocked>::invoke(1.0, A, b);
 
@@ -89,8 +80,8 @@ struct SerialGetrs<Trans::Transpose, Algo::Level3::Unblocked> {
     auto info = checkGetrsInput(A, b);
     if (info) return info;
 
-    auto info_trsm = KokkosBatched::SerialTrsm<Side::Left, Uplo::Upper, Trans::Transpose, Diag::NonUnit,
-                                               Algo::Trsm::Unblocked>::invoke(1.0, A, b);
+    [[maybe_unused]] auto info_trsm = KokkosBatched::SerialTrsm<Side::Left, Uplo::Upper, Trans::Transpose, Diag::NonUnit,
+                                                                Algo::Trsm::Unblocked>::invoke(1.0, A, b);
     info_trsm =
         KokkosBatched::SerialTrsm<Side::Left, Uplo::Lower, Trans::Transpose, Diag::Unit, Algo::Trsm::Unblocked>::invoke(
             1.0, A, b);
@@ -103,3 +94,6 @@ struct SerialGetrs<Trans::Transpose, Algo::Level3::Unblocked> {
 }  // namespace KokkosBatched
 
 #endif  // KOKKOSBATCHED_GETRS_SERIAL_IMPL_HPP_
+
+// NOLINTEND(*)
+// clang-format on
diff --git a/include/ddc/kernels/splines/splines_linear_problem_band.hpp b/include/ddc/kernels/splines/splines_linear_problem_band.hpp
index 8d46aa0c8..3d674b729 100644
--- a/include/ddc/kernels/splines/splines_linear_problem_band.hpp
+++ b/include/ddc/kernels/splines/splines_linear_problem_band.hpp
@@ -20,9 +20,10 @@
 #include <lapacke.h>
 #endif
 
-#include "KokkosBatched_Gbtrs.hpp"
 #include <KokkosBatched_Util.hpp>
 
+#include "kokkos-kernels-ext/KokkosBatched_Gbtrs.hpp"
+
 #include "splines_linear_problem.hpp"
 
 namespace ddc::detail {
diff --git a/include/ddc/kernels/splines/splines_linear_problem_dense.hpp b/include/ddc/kernels/splines/splines_linear_problem_dense.hpp
index 59b230a71..8ee0c22b9 100644
--- a/include/ddc/kernels/splines/splines_linear_problem_dense.hpp
+++ b/include/ddc/kernels/splines/splines_linear_problem_dense.hpp
@@ -18,9 +18,10 @@
 #include <lapacke.h>
 #endif
 
-#include "KokkosBatched_Getrs.hpp"
 #include <KokkosBatched_Util.hpp>
 
+#include "kokkos-kernels-ext/KokkosBatched_Getrs.hpp"
+
 #include "splines_linear_problem.hpp"
 
 namespace ddc::detail {