Install specifically deluge{d,-web} version 1.3.15-2.

Dockerfile

@@ -15,8 +15,8 @@ RUN apt-get update \
     && wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add - \
     && echo "deb http://build.openvpn.net/debian/openvpn/stable xenial main" > /etc/apt/sources.list.d/openvpn-aptrepo.list \
     && apt-get update \
-    && apt-get install -qy sudo deluged deluge-web curl rar unrar zip unzip ufw iputils-ping openvpn bc \
-    python2.7 python2.7-pysqlite2 \
+    && apt-get install -qy sudo deluged=1.3.15-2 deluge-web=1.3.15-2 curl rar \
+    unrar zip unzip ufw iputils-ping openvpn bc python2.7 python2.7-pysqlite2 \
     && ln -sf /usr/bin/python2.7 /usr/bin/python2 \
     && apt-get install -y tinyproxy telnet \
     && wget https://github.com/Yelp/dumb-init/releases/download/v1.2.0/dumb-init_1.2.0_amd64.deb \