diff --git a/agents.tf b/agents.tf
index b7f45cc..1e052e3 100644
--- a/agents.tf
+++ b/agents.tf
@@ -44,7 +44,7 @@ resource "null_resource" "agents" {
 
   # Generating k3s agent config file
   provisioner "file" {
-    content = yamlencode({
+    content = yamlencode(merge({
       node-name     = module.agents[each.key].name
       server        = "https://${module.control_planes[0].private_ipv4_address}:6443"
       token         = random_password.k3s_token.result
@@ -52,7 +52,11 @@ resource "null_resource" "agents" {
       flannel-iface = "eth1"
       node-ip       = module.agents[each.key].private_ipv4_address
       node-label    = var.automatically_upgrade_k3s ? ["k3s_upgrade=true"] : []
-    })
+    },
+      var.cni_plugin == "calico" ? {
+        flannel-backend             = "none"
+        kube-controller-manager-arg = "flex-volume-plugin-dir=/var/lib/kubelet/volumeplugins"
+      } : {}))
     destination = "/tmp/config.yaml"
   }