diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index fde3799..9081dfc 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -120,6 +120,14 @@ jobs:
             --from-literal=cookie-secret="${{ secrets.OAUTH2_PROXY_COOKIE_SECRET }}" \
             --dry-run=client -o yaml | kubectl apply -f -
 
+      
+      - name: Install/upgrade Prometheus CRDs (server-side, hors Helm)
+        if: ${{ inputs.service == 'all' || inputs.service == 'monitoring' }}
+        run: |
+          kubectl apply --server-side --force-conflicts -f \
+            https://raw.githubusercontent.com/prometheus-operator/prometheus-operator/main/bundle.yaml \
+            --field-manager=prometheus-operator
+
       - name: Deploy Monitoring
         if: ${{ inputs.service == 'all' || inputs.service == 'monitoring' }}
         run: |