diff --git a/tasks/main.yml b/tasks/main.yml
index e90420a..f96d989 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -18,6 +18,20 @@
   notify: restart kubelet
   with_items: "{{ kubernetes_packages }}"
 
+# per the install doc, 
+# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
+- name: Set sysctl for IPv4 bridges
+  sysctl:
+    name: net.bridge.bridge-nf-call-iptables
+    value: 1
+    state: present
+
+- name: Set sysctl for IPv6 bridges
+  sysctl:
+    name: net.bridge.bridge-nf-call-ip6tables
+    value: 1
+    state: present
+
 - include_tasks: kubelet-setup.yml
 
 - name: Ensure kubelet is started and enabled at boot.