diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b48b10c..efe34c6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
     - name: Checkout Code
-      uses: actions/checkout@v3       # must checkout before we can use our own actions
+      uses: actions/checkout@v4       # must checkout before we can use our own actions
     - name: Build
       uses: ./.github/actions/build-lin
       id: build
@@ -37,7 +37,7 @@ jobs:
         cp -a ./inc deploy-lib
         mv ${{ steps.build.outputs.lib-file-name }} deploy-lib/lib/lin
     - name: Upload XPMP2 lib
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: XPMP2-lib
         path: deploy-lib/*        # this way we keep the folder structure in the artifact
@@ -49,7 +49,7 @@ jobs:
     runs-on: macos-11
     steps:
     - name: Checkout Code
-      uses: actions/checkout@v3       # must checkout before we can use our own actions
+      uses: actions/checkout@v4       # must checkout before we can use our own actions
     - name: Build
       uses: ./.github/actions/build-mac
       id: build
@@ -62,7 +62,7 @@ jobs:
         mkdir -p deploy-lib/lib
         mv ${{ steps.build.outputs.lib-file-name }} deploy-lib/lib
     - name: Upload XPMP2 Framework
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: XPMP2-lib
         path: deploy-lib/*        # this way we keep the folder structure in the artifact
@@ -74,7 +74,7 @@ jobs:
     runs-on: windows-2022
     steps:
     - name: Checkout Code
-      uses: actions/checkout@v3       # must checkout before we can use our own actions
+      uses: actions/checkout@v4       # must checkout before we can use our own actions
     - name: Build
       uses: ./.github/actions/build-win
       id: build
@@ -87,7 +87,7 @@ jobs:
         mkdir -p deploy-lib/lib/win
         cp ${{ steps.build.outputs.lib-file-name }} deploy-lib/lib/win
     - name: Upload XPMP2 lib
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: XPMP2-lib
         path: deploy-lib/*        # this way we keep the folder structure in the artifact