diff --git a/README.md b/README.md
index 027a8ba..568462d 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,8 @@ Setup K3s cluster nodes.
 
 - [Requirements](#requirements)
 - [Default Variables](#default-variables)
+  - [k3s_flannel_external_ip](#k3s_flannel_external_ip)
+  - [k3s_flannel_ipv6_masq_enabled](#k3s_flannel_ipv6_masq_enabled)
   - [k3s_init_log_enabled](#k3s_init_log_enabled)
   - [k3s_iscsi_enabled](#k3s_iscsi_enabled)
   - [k3s_node_ip](#k3s_node_ip)
@@ -55,6 +57,22 @@ Setup K3s cluster nodes.
 
 ## Default Variables
 
+### k3s_flannel_external_ip
+
+#### Default value
+
+```YAML
+k3s_flannel_external_ip: _unset_
+```
+
+### k3s_flannel_ipv6_masq_enabled
+
+#### Default value
+
+```YAML
+k3s_flannel_ipv6_masq_enabled: false
+```
+
 ### k3s_init_log_enabled
 
 #### Default value