diff --git a/terraform/servers.tf b/terraform/servers.tf
index e4f5535..5b72730 100644
--- a/terraform/servers.tf
+++ b/terraform/servers.tf
@@ -10,7 +10,7 @@ resource "hcloud_server" "control_plane" {
   server_type = var.control_plane_type
   image       = data.hcloud_image.ubuntu.id
   location    = var.location
-  ssh_keys    = [hcloud_ssh_key.cluster.id]
+  ssh_keys    = [data.hcloud_ssh_key.cluster.id]
 
   labels = {
     cluster = var.cluster_name
@@ -37,7 +37,7 @@ resource "hcloud_server" "workers" {
   server_type = var.worker_type
   image       = data.hcloud_image.ubuntu.id
   location    = var.location
-  ssh_keys    = [hcloud_ssh_key.cluster.id]
+  ssh_keys    = [data.hcloud_ssh_key.cluster.id]
 
   labels = {
     cluster = var.cluster_name