diff --git a/Dockerfile b/Dockerfile
index 1896419..23b7997 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -77,7 +77,7 @@ COPY update_ssmtp.sh /usr/local/bin/update_ssmtp.sh
 
 RUN chown www-data /etc/ssmtp /etc/ssmtp/ssmtp.conf && \
   chmod +x /usr/local/bin/update_ssmtp.sh /usr/local/bin/start.sh && \
-  mkdir -p /var/www
+  mkdir -p /var/www && chown www-data /var/www
 
 # Work around an aufs bug related to directory permissions:
 RUN mkdir -p /tmp && \