diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 8a283c0..20878b2 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -147,7 +147,7 @@ jobs:
         nox --force-color -e tests-3 -- -vv tests/
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -158,7 +158,7 @@ jobs:
         verbose: true
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -224,7 +224,7 @@ jobs:
         nox --force-color -e tests-3 -- -vv tests/
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -235,7 +235,7 @@ jobs:
         verbose: true
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -297,7 +297,7 @@ jobs:
         nox --force-color -e tests-3 -- -vv tests/
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -308,7 +308,7 @@ jobs:
         verbose: true
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/