diff --git a/helm-deploy/README.md b/helm-deploy/README.md
index 75c4cfa..30b016b 100644
--- a/helm-deploy/README.md
+++ b/helm-deploy/README.md
@@ -7,7 +7,7 @@ Deploy a service to Kubernetes via Helm over SSH.
 | Input | Required | Default | Description |
 |-------|----------|---------|-------------|
 | `service-name` | Yes | — | Helm release name |
-| `helm-host` | Yes | — | SSH target host (e.g. `dsp1-stage.schmalzgroup.net`) |
+| `helm-cluster` | Yes | — | Cluster to deploye to (one of `internal_stage` or `internal_prod`) |
 | `image-tag` | Yes | — | Docker image tag to deploy |
 | `ssh-key` | Yes | — | Private SSH key content |
 | `overrides-file` | No | `kubernetes/overrides-pu.yaml` | Local path to Helm values override file |
diff --git a/helm-deploy/action.yml b/helm-deploy/action.yml
index be3cfc5..cf75ad7 100644
--- a/helm-deploy/action.yml
+++ b/helm-deploy/action.yml
@@ -5,8 +5,8 @@ inputs:
   service-name:
     description: Helm release name
     required: true
-  helm-host:
-    description: SSH target (e.g., dsp1-stage.schmalzgroup.net)
+  helm-cluster:
+    description: Name of the target Kubernetes cluster to deploy to
     required: true
   overrides-file:
     description: Local path to Helm values override file
@@ -45,10 +45,22 @@ runs:
         chmod 600 "$SSH_KEY_FILE"
         echo "SSH_KEY_FILE=$SSH_KEY_FILE" >> "$GITHUB_ENV"
 
+    - name: Map cluster name to target host
+      id: map-host
+      shell: bash
+      env:
+        HELM_CLUSTER: ${{ inputs.helm-cluster }}
+      run: |
+        case "$HELM_CLUSTER" in
+          internal_stage) echo "host=dsp1-stage.schmalzgroup.net" ;;
+          internal_prod) echo "host=dsp1.schmalzgroup.net" ;;
+          *) echo "Invalid cluster '$HELM_CLUSTER'. Must be 'internal_stage' or 'internal_prod'." && exit 1 ;;
+        esac >> "$GITHUB_OUTPUT"
+
     - name: Copy overrides file
       shell: bash
       env:
-        HELM_HOST: ${{ inputs.helm-host }}
+        HELM_HOST: ${{ steps.map-host.outputs.host }}
         SERVICE_NAME: ${{ inputs.service-name }}
         OVERRIDES_FILE: ${{ inputs.overrides-file }}
       run: |
@@ -63,7 +75,7 @@ runs:
     - name: Helm deploy
       shell: bash
       env:
-        HELM_HOST: ${{ inputs.helm-host }}
+        HELM_HOST: ${{ steps.map-host.outputs.host }}
         SERVICE_NAME: ${{ inputs.service-name }}
         NAMESPACE: ${{ inputs.namespace }}
         HELM_REPO: ${{ inputs.helm-repo }}