diff --git a/.github/workflows/ci-unit_tests.yml b/.github/workflows/ci-unit_tests.yml
index 5c84b3c8a1..97e6db35af 100644
--- a/.github/workflows/ci-unit_tests.yml
+++ b/.github/workflows/ci-unit_tests.yml
@@ -26,11 +26,11 @@ jobs:
       fail-fast: false
       matrix:
         compiler: [
-            { name: Clang 13, cc: /usr/bin/clang-13, cxx: /usr/bin/clang++-13 },
-            { name: Clang 14, cc: /usr/bin/clang-14, cxx: /usr/bin/clang++-14 },
+            { name: Clang 15, cc: /usr/bin/clang-15, cxx: /usr/bin/clang++-15 },
             { name: GCC 10, cc: /usr/bin/gcc-10, cxx: /usr/bin/g++-10 },
             # { name: GCC 11, cc: /usr/bin/gcc-11, cxx: /usr/bin/g++-11 }, # ? Not working yet, see https://github.com/boost-ext/sml/issues/546
             { name: GCC 12, cc: /usr/bin/gcc-12, cxx: /usr/bin/g++-12 },
+            { name: GCC 13, cc: /usr/bin/gcc-13, cxx: /usr/bin/g++-13 },
           ]
 
     steps: