diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4eacec7..62c44a7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -87,7 +87,9 @@ jobs:
         run: sbt 'project ${{ matrix.project }}' '++ ${{ matrix.scala }}' coverage test coverageReport
 
       - name: Codecov
-        uses: codecov/codecov-action@v3
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+        uses: codecov/codecov-action@v4
 
       - name: Make target directories
         if: github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/master')
diff --git a/build.sbt b/build.sbt
index f5c82bd..59303c6 100644
--- a/build.sbt
+++ b/build.sbt
@@ -42,8 +42,9 @@ ThisBuild / githubWorkflowBuild ++= Seq(
     cond = Some(s"matrix.scala != '3'")
   ),
   WorkflowStep.Use(
-    ref = UseRef.Public("codecov", "codecov-action", "v3"),
-    name = Some("Codecov")
+    ref = UseRef.Public("codecov", "codecov-action", "v4"),
+    name = Some("Codecov"),
+    env = Map("CODECOV_TOKEN" -> "${{ secrets.CODECOV_TOKEN }}")
   )
 )
 ThisBuild / mergifyPrRules := {