diff --git a/README.md b/README.md
index 095d2ee4..1f274511 100644
--- a/README.md
+++ b/README.md
@@ -155,7 +155,7 @@ cd ~/ovn-heater
 ```
 
 This step will:
-- clone OVS, OVN and ovn-fake-multinode upstream master branches in the
+- clone OVS, OVN and ovn-fake-multinode upstream main branches in the
   `runtime` directory.
 - build the `ovn/ovn-multi-node` container image which will be used by the
   fake nodes spawned during the tests.  OVS/OVN binaries are built with
diff --git a/do.sh b/do.sh
index 9d94e03a..a2a65fc0 100755
--- a/do.sh
+++ b/do.sh
@@ -177,7 +177,7 @@ function clone_component() {
 
 # OVS/OVN env vars
 ovs_repo="${OVS_REPO:-https://github.com/openvswitch/ovs.git}"
-ovs_branch="${OVS_BRANCH:-master}"
+ovs_branch="${OVS_BRANCH:-main}"
 ovn_repo="${OVN_REPO:-https://github.com/ovn-org/ovn.git}"
 ovn_branch="${OVN_BRANCH:-main}"