diff --git a/Dockerfile b/Dockerfile
index 49411e1..c04d613 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM d4science/rstudio-base:2023-03-R4-2
 LABEL org.d4science.image.licenses="EUPL-1.2" \
       org.d4science.image.source="https://code-repo.d4science.org/gCubeSystem/rstudio-d4science" \
       org.d4science.image.vendor="D4Science <https://www.d4science.org>" \
-      org.d4science.image.authors="Andrea Dell'Amico <andrea.dellamico@isti.cnr.it>
+      org.d4science.image.authors="Andrea Dell'Amico <andrea.dellamico@isti.cnr.it>"
 
 COPY rsession.conf /etc/rstudio/rsession.conf
 RUN chmod 0644 /etc/rstudio/rsession.conf