diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5feea30..55e6641 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -29,7 +29,7 @@ jobs:
     - name: cmake
       run: cmake . -DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }} -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON
       env:
-        FC: gfortran-13
+        FC: gfortran-12
     - name: cmake build
       run: cmake --build . --config ${{ env.BUILD_TYPE }}
     - name: ctest