diff --git a/Dockerfile b/Dockerfile
index fce6945009e098fbf7c9ec54159f5923c321ad11..09003f935fa490604a3a381646a5b1949a5c42e3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ ADD . /build
 RUN apt-get -q update && env DEBIAN_FRONTEND=noninteractive apt-get -qy install --no-install-recommends bash curl make patch rsync default-jre-headless wget unzip npm
 RUN /build/install-roundcube --version=${RC_VERSION} --destdir=/build/src build && echo ${RC_VERSION} > /build/src/.rc_version
 
-FROM registry.git.autistici.org/ai3/docker/apache2-php-base:master
+FROM registry.git.autistici.org/ai3/docker/apache2-php-base:hardening
 
 COPY conf /tmp/conf
 COPY build.sh /tmp/build.sh