diff --git a/Dockerfile b/Dockerfile
index 23d0bc1..f2e6002 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,5 +3,6 @@ FROM caddy:2-builder-alpine AS builder
 RUN xcaddy build --with github.com/caddy-dns/porkbun@v0.1.4
 
 FROM caddy:2-alpine
+LABEL org.opencontainers.image.source=https://github.com/wbrawner/caddy-porkbun
 
 COPY --from=builder /usr/bin/caddy /usr/bin/caddy