diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 93f9d3874..0c366d38a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -57,7 +57,7 @@ jobs:
         if [[ ${{ matrix.build }} =~ debug ]]; then make -j1 OS=${{ matrix.platform }} snapshot ; fi
 
     - name: upload build as workflow artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: src/YAM_${{ matrix.platform }}_*.lha
         name: YAM${{ env.YAMVER }}_${{ matrix.platform }}_${{ env.GITHUB_SHA7 }}-${{ matrix.build }}.lha
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index d4929204c..889eecba5 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -136,42 +136,42 @@ jobs:
         max_releases: 3
 
     - name: upload AmigaOS4 files as workflow artifact [release]
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-AmigaOS4.lha*
         name: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-${{ env.GITHUB_SHA7 }}-AmigaOS4.lha
       continue-on-error: true
 
     - name: upload AmigaOS4 files as workflow artifact [debug]
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-AmigaOS4-debug.lha*
         name: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-${{ env.GITHUB_SHA7 }}-AmigaOS4-debug.lha
       continue-on-error: true
 
     - name: upload AmigaOS3 files as workflow artifact [release]
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-AmigaOS3.lha*
         name: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-${{ env.GITHUB_SHA7 }}-AmigaOS3.lha
       continue-on-error: true
 
     - name: upload AmigaOS3 files as workflow artifact [debug]
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-AmigaOS3-debug.lha*
         name: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-${{ env.GITHUB_SHA7 }}-AmigaOS3-debug.lha
       continue-on-error: true
 
     - name: upload MorphOS files as workflow artifact [release]
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-MorphOS.lha*
         name: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-${{ env.GITHUB_SHA7 }}-MorphOS.lha
       continue-on-error: true
 
     - name: upload MorphOS files as workflow artifact [debug]
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-MorphOS-debug.lha*
         name: YAM${{ env.YAMVER }}dev-${{ env.DATE }}-${{ env.GITHUB_SHA7 }}-MorphOS-debug.lha
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3d6701a53..d513a6a0f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -50,21 +50,21 @@ jobs:
         make -j1 release
 
     - name: upload os4 release files as workflow artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: YAM*-AmigaOS4-*.lha*
         name: YAM${{ env.YAMVER }}-AmigaOS4-${{ env.GITHUB_SHA7 }}.lha
       continue-on-error: true
 
     - name: upload os3 release files as workflow artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: YAM*-AmigaOS3-*.lha*
         name: YAM${{ env.YAMVER }}-AmigaOS3-${{ env.GITHUB_SHA7 }}.lha
       continue-on-error: true
 
     - name: upload mos release files as workflow artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         path: YAM*-MorphOS-*.lha*
         name: YAM${{ env.YAMVER }}-MorphOS-${{ env.GITHUB_SHA7 }}.lha