diff --git a/Dockerfile b/Dockerfile
index 8c18e69..2047729 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,7 @@
 FROM quay.io/thallian/php7-fpm:latest
 
+ENV VERSION 1.2.5
+
 RUN apk add --no-cache \
     libressl \
     tar \
@@ -27,10 +29,8 @@ RUN apk add --no-cache \
     php7-pspell \
     php7-apcu
 
-RUN ln -s /usr/bin/php7 /usr/bin/php
-
 RUN mkdir /var/lib/roundcube
-RUN wget -qO- https://github.com/roundcube/roundcubemail/releases/download/1.2.3/roundcubemail-1.2.3-complete.tar.gz | tar xz -C /var/lib/roundcube --strip 1
+RUN wget -qO- https://github.com/roundcube/roundcubemail/releases/download/$VERSION/roundcubemail-$VERSION-complete.tar.gz | tar xz -C /var/lib/roundcube --strip 1
 RUN chown -R nginx:nginx /var/lib/roundcube
 
 RUN mkdir /run/nginx