diff --git a/docker/README.md b/docker/README.md
index 4e10daae..1ea8f984 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -6,7 +6,7 @@ Available at: https://hub.docker.com/r/mikebrady/shairport-sync
 
 TODO: remove `--ssh` when going public as this is only for private repos.
 ```
-docker buildx build --ssh github=$SSH_AUTH_SOCK --platform linux/arm/v7 -f ./docker/Dockerfile --build-arg SHAIRPORT_SYNC_BRANCH=charles-dev -t registry.nova.do/shairport-sync:unstable-development .
+docker buildx build --ssh github=$SSH_AUTH_SOCK --platform linux/arm/v7 -f ./docker/Dockerfile --build-arg SHAIRPORT_SYNC_BRANCH=unstable-development -t registry.nova.do/shairport-sync:unstable-development .
 ```
 
 `SHAIRPORT_SYNC_BRANCH` is required to ensure the image is built using the expected branch.
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