diff --git a/Dockerfile b/Dockerfile
index 6e4b3e5..0f0e49e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,10 +4,20 @@ FROM immawanderer/archlinux:linux-amd64
 ARG BUILD_DATE
 ARG VCS_REF
 
+# as per https://github.com/opencontainers/image-spec/blob/main/annotations.md,
+# keep Label Schema labels for backward compatibility.
 LABEL org.label-schema.build-date=$BUILD_DATE \
       org.label-schema.vcs-url="https://git.dotya.ml/wanderer/docker-archlinux-cdev.git" \
       org.label-schema.vcs-ref=$VCS_REF \
-      org.label-schema.license=GPL-3.0
+      org.label-schema.license=GPL-3.0 \
+      org.opencontainers.image.title="docker-archlinux-cdev" \
+      org.opencontainers.image.description="container image for C development" \
+      org.opencontainers.image.created=$BUILD_DATE \
+      org.opencontainers.image.authors=wanderer \
+      org.opencontainers.image.url="https://git.dotya.ml/wanderer/docker-archlinux-cdev.git" \
+      org.opencontainers.image.source="https://git.dotya.ml/wanderer/docker-archlinux-cdev.git" \
+      org.opencontainers.image.revision=$VCS_REF \
+      org.opencontainers.image.licenses=GPL-3.0
 
 RUN pacman --version && \
 	\