diff --git a/.github/workflows/ci-linux.yml b/.github/workflows/ci-linux.yml
index d2b754f..5b83a4e 100644
--- a/.github/workflows/ci-linux.yml
+++ b/.github/workflows/ci-linux.yml
@@ -118,9 +118,11 @@ jobs:
     - name: test (pytest)
       run: pytest -v
       
-    - uses: actions/upload-artifact@v1
+    - name: 'Upload error log'
+      uses: actions/upload-artifact@v4
       if: failure()
       with:
         name: ${{matrix.container}}_testlog
-        path: builddir/meson-logs/testlog.txt
+        path: builddir/meson-logs/meson-log.txt
+        retention-days: 5
     
diff --git a/.github/workflows/ci-mac.yml b/.github/workflows/ci-mac.yml
index 92f9de8..12897b1 100644
--- a/.github/workflows/ci-mac.yml
+++ b/.github/workflows/ci-mac.yml
@@ -105,8 +105,10 @@ jobs:
     - name: test (pytest)
       run: pytest -v
       
-    - uses: actions/upload-artifact@v1
+    - name: 'Upload error log'
+      uses: actions/upload-artifact@v4
       if: failure()
       with:
         name: ${{matrix.container}}_testlog
-        path: builddir/meson-logs/testlog.txt
+        path: builddir/meson-logs/meson-log.txt
+        retention-days: 5
diff --git a/.github/workflows/ci-windows.yml b/.github/workflows/ci-windows.yml
index e379861..fe80d8c 100644
--- a/.github/workflows/ci-windows.yml
+++ b/.github/workflows/ci-windows.yml
@@ -161,8 +161,10 @@ jobs:
     - name: test (pytest)
       run: pytest -v
     
-    - uses: actions/upload-artifact@v1
+    - name: 'Upload error log'
+      uses: actions/upload-artifact@v4
       if: failure()
       with:
-        name: Windows_Meson_testlog
-        path: builddir/meson-logs/testlog.txt
+        name: windows_Meson_testlog
+        path: builddir/meson-logs/meson-log.txt
+        retention-days: 5
diff --git a/meson.build b/meson.build
index f2faca0..90bbb48 100644
--- a/meson.build
+++ b/meson.build
@@ -28,7 +28,7 @@ elif  meson.get_compiler('cpp').get_id() == 'clang'
   # compile_args : ['-fopenmp'],
   # dependencies : [libomp]
   # )
-  omp_dep = dependency('openmp')
+  omp_dep = declare_dependency()
 else
   omp_dep = dependency('openmp')
 endif