diff --git a/Containerfile b/Containerfile
index 905f85b..3a375d8 100644
--- a/Containerfile
+++ b/Containerfile
@@ -4,12 +4,21 @@ FROM docker.io/nixos/nix:2.11.0-amd64
 ARG BUILD_DATE
 ARG VCS_REF
 
-LABEL description="Container image containing nixpkgs-fmt"
-
-LABEL org.label-schema.build-date=$BUILD_DATE \
+# as per https://github.com/opencontainers/image-spec/blob/main/annotations.md,
+# keep Label Schema labels for backward compatibility.
+LABEL description="Container w/ nix + nixpkgs-fmt" \
+      org.label-schema.build-date=$BUILD_DATE \
       org.label-schema.vcs-url="https://git.dotya.ml/wanderer-containers/nix-nixpkgs-fmt.git" \
       org.label-schema.vcs-ref=$VCS_REF \
-      org.label-schema.license=GPL-3.0
+      org.label-schema.license=GPL-3.0 \
+      org.opencontainers.image.title="nix-nixpkgs-fmt" \
+      org.opencontainers.image.description="Container w/ nix + nixpkgs-fmt" \
+      org.opencontainers.image.created=$BUILD_DATE \
+      org.opencontainers.image.authors=wanderer \
+      org.opencontainers.image.url="https://git.dotya.ml/wanderer-containers/nix-nixpkgs-fmt.git" \
+      org.opencontainers.image.source="https://git.dotya.ml/wanderer-containers/nix-nixpkgs-fmt.git" \
+      org.opencontainers.image.revision=$VCS_REF \
+      org.opencontainers.image.licenses=GPL-3.0
 
 RUN nix-env -iA nixpkgs.nixpkgs-fmt