diff --git a/.github/workflows/pathogen-repo-build.yaml b/.github/workflows/pathogen-repo-build.yaml
index e0a1faa..fc6299a 100644
--- a/.github/workflows/pathogen-repo-build.yaml
+++ b/.github/workflows/pathogen-repo-build.yaml
@@ -221,7 +221,7 @@ jobs:
           > "$GITHUB_STEP_SUMMARY"
 
       - if: always()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           if-no-files-found: warn
           name: ${{ inputs.artifact-name }}
diff --git a/.github/workflows/pathogen-repo-ci.yaml b/.github/workflows/pathogen-repo-ci.yaml
index 753a4b3..3eb8043 100644
--- a/.github/workflows/pathogen-repo-ci.yaml
+++ b/.github/workflows/pathogen-repo-ci.yaml
@@ -239,7 +239,7 @@ jobs:
       - run: nextstrain build . ${{ inputs.build-args }}
 
       - if: always()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ inputs.artifact-name }}-${{ matrix.runtime }}
           path: |