diff --git a/Dockerfile b/Dockerfile
index d4f2d6f..c9376d6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,13 +35,13 @@ ARG BUILD_ARG=0
 ARG VERSION_ARG="0.0"
 ENV VERSION=$VERSION_ARG
 
-LABEL org.opencontainers.image.licenses=MIT 
-LABEL org.opencontainers.image.title=QEMU for Docker
+LABEL org.opencontainers.image.licenses="MIT"
+LABEL org.opencontainers.image.title="QEMU for Docker"
 LABEL org.opencontainers.image.created=${DATE_ARG}
 LABEL org.opencontainers.image.revision=${BUILD_ARG}
 LABEL org.opencontainers.image.version=${VERSION_ARG}
-LABEL org.opencontainers.image.source=https://github.com/qemu-tools/qemu-docker/
-LABEL org.opencontainers.image.url=https://hub.docker.com/r/qemux/qemu-docker/
-LABEL org.opencontainers.image.description=QEMU in a docker container using KVM acceleration
+LABEL org.opencontainers.image.source="https://github.com/qemu-tools/qemu-docker/"
+LABEL org.opencontainers.image.url="https://hub.docker.com/r/qemux/qemu-docker/"
+LABEL org.opencontainers.image.description="QEMU in a docker container using KVM acceleration"
 
 ENTRYPOINT ["/usr/bin/tini", "-s", "/run/run.sh"]