diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index cc19748d..a658007c 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -23,13 +23,16 @@ jobs:
         uses: actions/setup-node@v7
         with:
           node-version: '18.x'
-          cache: 'npm'
+          cache: 'yarn'
+
+      - name: Enable Corepack
+        run: corepack enable
 
       - name: Install dependencies
-        run: npm ci
+        run: yarn install --immutable
 
       - name: Build frontend
-        run: npm run build
+        run: yarn run build
         env:
           CI: true
 
@@ -299,13 +302,16 @@ jobs:
         uses: actions/setup-node@v7
         with:
           node-version: '18.x'
-          cache: 'npm'
+          cache: 'yarn'
 
       - name: Enable Corepack
         run: corepack enable
 
+      - name: Install dependencies
+        run: yarn install --immutable
+
       - name: Install CycloneDX tooling
-        run: npm install -g @cyclonedx/cyclonedx-npm
+        run: yarn global add @cyclonedx/cyclonedx-npm
 
       - name: Generate frontend SBOM (CycloneDX)
         run: |