diff --git a/digital-ocean/container-linux/kubernetes/controllers.tf b/digital-ocean/container-linux/kubernetes/controllers.tf
index eae94b10e..5b2653a07 100644
--- a/digital-ocean/container-linux/kubernetes/controllers.tf
+++ b/digital-ocean/container-linux/kubernetes/controllers.tf
@@ -45,7 +45,7 @@ resource "digitalocean_droplet" "controllers" {
   private_networking = true
 
   user_data = "${element(data.ct_config.controller_ign.*.rendered, count.index)}"
-  ssh_keys  = "${var.ssh_fingerprints}"
+  ssh_keys  = [ "${var.ssh_fingerprints}" ]
 
   tags = [
     "${digitalocean_tag.controllers.id}",
diff --git a/digital-ocean/container-linux/kubernetes/workers.tf b/digital-ocean/container-linux/kubernetes/workers.tf
index 51c4a7a09..59056b4ed 100644
--- a/digital-ocean/container-linux/kubernetes/workers.tf
+++ b/digital-ocean/container-linux/kubernetes/workers.tf
@@ -26,7 +26,7 @@ resource "digitalocean_droplet" "workers" {
   private_networking = true
 
   user_data = "${data.ct_config.worker_ign.rendered}"
-  ssh_keys  = "${var.ssh_fingerprints}"
+  ssh_keys  = [ "${var.ssh_fingerprints}" ]
 
   tags = [
     "${digitalocean_tag.workers.id}",