diff --git a/.github/workflows/ci-c.yml b/.github/workflows/ci-c.yml
index 57b1ee5..2393faf 100644
--- a/.github/workflows/ci-c.yml
+++ b/.github/workflows/ci-c.yml
@@ -17,7 +17,7 @@ jobs:
       run: |
         $Env:Path += ";${Env:ProgramFiles}\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\"; msbuild ErrLib\ErrLib.vcxproj -p:ErrLibCompilationMode=CompileAsC
     - name: Archive build results
-      uses: actions/upload-artifact@v1
+      uses: actions/upload-artifact@v4
       with:
-          name: Output
+          name: OutputC
           path: ErrLib/Debug/
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 009bcb0..f505b66 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
       run: |
         Set-Location -Path .\Debug; & "${env:ProgramFiles}\Microsoft Visual Studio\2022\Enterprise\Common7\IDE\Extensions\TestPlatform\vstest.console.exe" ErrLib_Tests.dll
     - name: Archive build results
-      uses: actions/upload-artifact@v1
+      uses: actions/upload-artifact@v4
       with:
           name: Output
           path: Debug/
diff --git a/.github/workflows/ci64.yml b/.github/workflows/ci64.yml
index b0f2026..6ba26f8 100644
--- a/.github/workflows/ci64.yml
+++ b/.github/workflows/ci64.yml
@@ -20,7 +20,7 @@ jobs:
       run: |
         Set-Location -Path .\x64\Debug; & "${env:ProgramFiles}\Microsoft Visual Studio\2022\Enterprise\Common7\IDE\Extensions\TestPlatform\vstest.console.exe" ErrLib_Tests.dll
     - name: Archive build results
-      uses: actions/upload-artifact@v1
+      uses: actions/upload-artifact@v4
       with:
-          name: Output
+          name: Output64
           path: x64/