diff --git a/ansible/group_vars/nimbus.mainnet.yml b/ansible/group_vars/nimbus.mainnet.yml
index 13e6b40..d4b3c86 100644
--- a/ansible/group_vars/nimbus.mainnet.yml
+++ b/ansible/group_vars/nimbus.mainnet.yml
@@ -1,6 +1,6 @@
 ---
 beacon_node_network: 'mainnet'
-beacon_node_cont_tag: 'stable-small'
+beacon_node_repo_branch: 'stable'
 
 # 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)}}'