diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 145ffeb..2497fe6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -46,7 +46,7 @@ jobs:
         run: dotnet test --no-build ./MimeMapping.sln
 
       - name: Codecov
-        uses: codecov/codecov-action@v3.1.6
+        uses: codecov/codecov-action@v4.0.0
         with:
           files: '**/TestResults/*/*.cobertura.xml'