diff --git a/docker/mariadb/Dockerfile.j2 b/docker/mariadb/Dockerfile.j2
index 2bd8419..620039e 100644
--- a/docker/mariadb/Dockerfile.j2
+++ b/docker/mariadb/Dockerfile.j2
@@ -1,9 +1,10 @@
 FROM {{ image_spec("base-tools") }}
 MAINTAINER {{ maintainer }}
 
-COPY sources.list.debian /etc/apt/sources.list.d/mariadb.list
-COPY apt_preferences.debian /etc/apt/preferences
-RUN apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xcbcb082a1bb943db
+COPY {{ render('sources.list.debian.j2') }} /etc/apt/sources.list.d/mariadb.list
+COPY {{ render('apt_preferences.debian.j2') }} /etc/apt/preferences
+RUN apt-key adv --recv-keys --keyserver {{ url.mariadb.debian.keyserver }} \
+    {{ url.mariadb.debian.keyid }}
 RUN apt-get update && \
        apt-get install -y --no-install-recommends \
         mariadb-server-10.1 \
diff --git a/docker/mariadb/apt_preferences.debian b/docker/mariadb/apt_preferences.debian
deleted file mode 100644
index e847cee..0000000
--- a/docker/mariadb/apt_preferences.debian
+++ /dev/null
@@ -1,3 +0,0 @@
-Package: *
-Pin: origin "lon1.mirrors.digitalocean.com"
-Pin-Priority: 500
diff --git a/docker/mariadb/apt_preferences.debian.j2 b/docker/mariadb/apt_preferences.debian.j2
new file mode 100644
index 0000000..54d43c0
--- /dev/null
+++ b/docker/mariadb/apt_preferences.debian.j2
@@ -0,0 +1,3 @@
+Package: *
+Pin: origin "{{ url.mariadb.debian.repo | host }}"
+Pin-Priority: 500
diff --git a/docker/mariadb/sources.list.debian b/docker/mariadb/sources.list.debian
deleted file mode 100644
index aae9ac2..0000000
--- a/docker/mariadb/sources.list.debian
+++ /dev/null
@@ -1,14 +0,0 @@
-# Default repos
-deb http://httpredir.debian.org/debian jessie main
-
-# jessie-backports
-deb http://httpredir.debian.org/debian jessie-backports main contrib
-
-# jessie-updates, previously known as 'volatile'
-deb http://httpredir.debian.org/debian jessie-updates main
-
-# debian security updates
-deb http://security.debian.org jessie/updates main
-
-# Maria DB repo
-deb [arch=amd64,i386] http://lon1.mirrors.digitalocean.com/mariadb/repo/10.1/debian jessie main
diff --git a/docker/mariadb/sources.list.debian.j2 b/docker/mariadb/sources.list.debian.j2
new file mode 100644
index 0000000..5d4921d
--- /dev/null
+++ b/docker/mariadb/sources.list.debian.j2
@@ -0,0 +1,2 @@
+# Maria DB repo
+deb [arch=amd64,i386] {{ url.mariadb.debian.repo }} jessie main
diff --git a/service/files/defaults.yaml b/service/files/defaults.yaml
index c2ba3b9..d803850 100644
--- a/service/files/defaults.yaml
+++ b/service/files/defaults.yaml
@@ -5,3 +5,9 @@ configs:
   mariadb:
     port:
       cont: 3306
+url:
+  mariadb:
+    debian:
+      repo: "http://lon1.mirrors.digitalocean.com/mariadb/repo/10.1/debian"
+      keyserver: "hkp://keyserver.ubuntu.com:80"
+      keyid: "0xcbcb082a1bb943db"