diff --git a/Dockerfile b/Dockerfile
index 160793c..5c0f17d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,9 +16,9 @@ ARG CANAL stable
 ENV CNL_DOTCLEAR=$CANAL
 
 # Image label
-LABEL org.opencontainers.image.source=https://github.com/JcDenis/docker-dotclear
-LABEL org.opencontainers.image.description="Dotclear docker image $CNL_DOTCLEAR"
-LABEL org.opencontainers.image.licenses=AGPL-3.0
+LABEL "org.opencontainers.image.source"="https://github.com/JcDenis/docker-dotclear"
+LABEL "org.opencontainers.image.description"="Dotclear docker image $CNL_DOTCLEAR"
+LABEL "org.opencontainers.image.licenses"="AGPL-3.0"
 
 ##
 # Nginx