diff --git a/ansible/host_vars/bootstrap-01.aws-eu-central-1a.nimbus.mainnet.yml b/ansible/host_vars/bootstrap-01.aws-eu-central-1a.nimbus.mainnet.yml
index f870149..9af3a12 100644
--- a/ansible/host_vars/bootstrap-01.aws-eu-central-1a.nimbus.mainnet.yml
+++ b/ansible/host_vars/bootstrap-01.aws-eu-central-1a.nimbus.mainnet.yml
@@ -1,5 +1,6 @@
 ---
 swap_file_path: '/main.swap'
+swap_file_size_mb: 4096
 
 # WARNING: Since these are Eth 2 bootnodes we need to keep the keys and IPs unchanged.
 beacon_node_netkey: '{{lookup("bitwarden", "nimbus/netkey", field=hostname)}}'
diff --git a/ansible/host_vars/bootstrap-02.aws-eu-central-1a.nimbus.mainnet.yml b/ansible/host_vars/bootstrap-02.aws-eu-central-1a.nimbus.mainnet.yml
index f870149..9af3a12 100644
--- a/ansible/host_vars/bootstrap-02.aws-eu-central-1a.nimbus.mainnet.yml
+++ b/ansible/host_vars/bootstrap-02.aws-eu-central-1a.nimbus.mainnet.yml
@@ -1,5 +1,6 @@
 ---
 swap_file_path: '/main.swap'
+swap_file_size_mb: 4096
 
 # WARNING: Since these are Eth 2 bootnodes we need to keep the keys and IPs unchanged.
 beacon_node_netkey: '{{lookup("bitwarden", "nimbus/netkey", field=hostname)}}'