diff --git a/.github/workflows/gh-pages.yaml b/.github/workflows/gh-pages.yaml
index f8f1fa0dca..18b5c0c8c3 100644
--- a/.github/workflows/gh-pages.yaml
+++ b/.github/workflows/gh-pages.yaml
@@ -3,7 +3,7 @@ on:
 
 env:
   FLUTTER_VERSION: 3.16.5
-  LIBOLM_VERSION: 3.2.15
+  LIBOLM_VERSION: 3.2.16
 
 name: Deploying on GitHub Pages
 
@@ -39,7 +39,7 @@ jobs:
           ssh-private-key: ${{ secrets.SSH_KEY }}
 
       - name: Setup Nix (to build libolm)
-        uses: cachix/install-nix-action@v19
+        uses: cachix/install-nix-action@v26
 
       - name: Build libolm
         run: |
@@ -51,13 +51,14 @@ jobs:
       - name: Build Web version
         env:
           FOLDER: ${{ github.event.pull_request.number }}
+          TWAKE_PREVIEW_CONFIG: ${{ secrets.TWAKE_PREVIEW_CONFIG }}
         run: |
           flutter config --enable-web
           flutter clean
           flutter pub get
           flutter pub run build_runner build --delete-conflicting-outputs
           flutter build web --release --verbose --source-maps --base-href="/${GITHUB_REPOSITORY##*/}/$FOLDER/"
-          yq '.issue_id = strenv(FOLDER)' config.sample.json > ./build/web/config.json
+          echo "$TWAKE_PREVIEW_CONFIG" | yq '.issue_id = strenv(FOLDER)' > ./build/web/config.json
 
       - name: Configure environments
         id: configure