diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eb1ccb32b..bd2c2fa84 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -114,18 +114,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4.1.7
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: substrate-connect-extension-source-code
           path: ./projects/extension
       - uses: ./.github/actions/turbo-build
       - run: pnpm --filter @substrate/extension build:firefox
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: substrate-connect-extension-mv3-firefox
           path: ./projects/extension/dist
       - run: pnpm --filter @substrate/extension build:chrome
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: substrate-connect-extension-mv3-chrome
           path: ./projects/extension/dist
diff --git a/.github/workflows/reusable-ci.yml b/.github/workflows/reusable-ci.yml
index 907cffcec..ea7f3a465 100644
--- a/.github/workflows/reusable-ci.yml
+++ b/.github/workflows/reusable-ci.yml
@@ -35,7 +35,7 @@ jobs:
     - name: Test projects/extension
       run: pnpm playwright:chromium --trace on
       working-directory: ./projects/extension
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@v5
       if: failure() || inputs.upload-artifacts
       with:
         name: playwright-report-substrate-connect-extension-mv3-chrome
@@ -53,7 +53,7 @@ jobs:
     - name: Test examples/light-client-extension-helpers-extension
       run: pnpm playwright:chromium --trace on
       working-directory: ./examples/light-client-extension-helpers-extension
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@v5
       if: failure() || inputs.upload-artifacts
       with:
         name: playwright-report-light-client-extension-helpers-extension-mv3-chrome
@@ -74,7 +74,7 @@ jobs:
     - name: Test projects/wallet-template
       run: pnpm playwright:chromium --trace on
       working-directory: ./projects/wallet-template
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@v5
       if: failure() || inputs.upload-artifacts
       with:
         name: playwright-report-substrate-connect-wallet-template-mv3-chrome
diff --git a/.github/workflows/update-chain-specs.yml b/.github/workflows/update-chain-specs.yml
index a62bd9f3a..a23470618 100644
--- a/.github/workflows/update-chain-specs.yml
+++ b/.github/workflows/update-chain-specs.yml
@@ -37,7 +37,7 @@ jobs:
     - id: get-chain-id  # Reads the `id` field in the newly-downloaded chain spec
       run: echo "id=`jq -r .id ./chain_spec.json`" >> $GITHUB_OUTPUT
     - if: ${{ steps.get-chain-id.outputs.id == '' }}
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: failed-response-${{ github.run_id }}
         path: |
@@ -57,7 +57,7 @@ jobs:
         output=./repo/projects/wallet-template/assets/chainspecs/${{ steps.get-chain-id.outputs.id }}.json
         jq --slurpfile downloaded ./chain_spec.json '.lightSyncState = $downloaded[0].lightSyncState' "$output" > "$tmp"
         mv "$tmp" "$output"
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@v5
       with:
         name: chain-spec-${{ steps.get-chain-id.outputs.id }}
         # Note that passing `repo/**` maintains paths under `repo`. This is a bit of magic by the upload-artifact action.