diff --git a/Dockerfile b/Dockerfile
index 8749256..f62981d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -57,14 +57,14 @@ ARG BUILD_ARG=0
 ARG VERSION_ARG="0.0"
 ENV VERSION=$VERSION_ARG
 
-LABEL org.opencontainers.image.licenses=MIT
-LABEL org.opencontainers.image.title=VirtualDSM
+LABEL org.opencontainers.image.licenses="MIT"
+LABEL org.opencontainers.image.title="VirtualDSM"
 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/kroese/virtual-dsm/
-LABEL org.opencontainers.image.url=https://hub.docker.com/r/kroese/virtual-dsm/
-LABEL org.opencontainers.image.description=Virtual DSM in a docker container
+LABEL org.opencontainers.image.source="https://github.com/kroese/virtual-dsm/"
+LABEL org.opencontainers.image.url="https://hub.docker.com/r/kroese/virtual-dsm/"
+LABEL org.opencontainers.image.description="Virtual DSM in a docker container"
 
 HEALTHCHECK --interval=60s --retries=2 CMD /run/check.sh