diff --git a/terraform/modules/docker-network/swarm-manager-node.tf b/terraform/modules/docker-network/swarm-manager-node.tf
index 7d3f33a..a37edfe 100644
--- a/terraform/modules/docker-network/swarm-manager-node.tf
+++ b/terraform/modules/docker-network/swarm-manager-node.tf
@@ -77,7 +77,9 @@ resource "hcloud_server" "node" {
     terraform_public_ssh_key : var.terraform_public_ssh_key
     github_public_ssh_key : var.github_public_ssh_key
     main_node : count.index == 0
-    packages_setup : base64encode(file("${path.module}/templates/scripts/install-packages.sh"))
+    packages_setup : base64encode(templatefile("${path.module}/templates/scripts/install-packages.sh.tftpl", {
+      manager_node : true
+    }))
     firewall_setup : base64encode(templatefile("${path.module}/templates/scripts/firewall-setup.sh.tftpl", {
       node_ip : var.private_node_ips[count.index]
       manager_node : true
diff --git a/terraform/modules/docker-network/swarm-worker-node.tf b/terraform/modules/docker-network/swarm-worker-node.tf
index 022afc2..35d5e6a 100644
--- a/terraform/modules/docker-network/swarm-worker-node.tf
+++ b/terraform/modules/docker-network/swarm-worker-node.tf
@@ -75,7 +75,9 @@ resource "hcloud_server" "worker_node" {
     admin_public_ssh_key : format("%s %s", var.admin_ssh_key.public_key, var.admin_ssh_key.name)
     admin_user : var.admin_user
     terraform_public_ssh_key : var.terraform_public_ssh_key
-    packages_setup : base64encode(file("${path.module}/templates/scripts/install-packages.sh"))
+    packages_setup : base64encode(templatefile("${path.module}/templates/scripts/install-packages.sh.tftpl", {
+      manager_node : false
+    }))
     firewall_setup : base64encode(templatefile("${path.module}/templates/scripts/firewall-setup.sh.tftpl", {
       node_ip : var.private_node_ips[count.index]
       manager_node : false
diff --git a/terraform/modules/docker-network/templates/scripts/install-packages.sh b/terraform/modules/docker-network/templates/scripts/install-packages.sh.tftpl
similarity index 88%
rename from terraform/modules/docker-network/templates/scripts/install-packages.sh
rename to terraform/modules/docker-network/templates/scripts/install-packages.sh.tftpl
index e2cb015..ce12ab0 100644
--- a/terraform/modules/docker-network/templates/scripts/install-packages.sh
+++ b/terraform/modules/docker-network/templates/scripts/install-packages.sh.tftpl
@@ -10,7 +10,7 @@ chmod a+r /etc/apt/keyrings/docker.asc
 # Add the repository to Apt sources:
 echo \
   "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
-  $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
+  $(. /etc/os-release && echo "$${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
   tee /etc/apt/sources.list.d/docker.list > /dev/null
 apt-get update
 
@@ -22,4 +22,6 @@ apt-get -y install ufw
 curl https://packages.hetzner.com/hcloud/deb/hc-utils_0.0.4-1_all.deb -o /run/tmpfiles.d/hc-utils_0.0.4-1_all.deb -s
 apt-get -y install /run/tmpfiles.d/hc-utils_0.0.4-1_all.deb
 
+%{if manager_node ~}
 apt-get -y install certbot
+%{endif ~}