diff --git a/pdns/Dockerfile b/pdns/Dockerfile
index b62888a..801df3f 100644
--- a/pdns/Dockerfile
+++ b/pdns/Dockerfile
@@ -12,17 +12,17 @@ ENV PDNSCONF_LAUNCH="gmysql" \
     PDNSCONF_API_KEY="" \
     SECALLZONES_CRONJOB="no"
 
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -q -y curl gnupg && \
-    curl https://repo.powerdns.com/FD380FBB-pub.asc | apt-key add - 
+ADD https://repo.powerdns.com/FD380FBB-pub.asc /etc/apt/trusted.gpg.d/powerdns-key.asc
 
 ADD pdns.list /etc/apt/sources.list.d/pdns.list
 ADD pdns.preference /etc/apt/preferences.d/pdns 
 
-RUN apt-get update && \
+RUN chmod 644 /etc/apt/trusted.gpg.d/powerdns-key.asc && \
+    apt-get update && \
     echo "path-include /usr/share/doc/*/*.sql" >> /etc/dpkg/dpkg.cfg.d/docker && \
     DEBIAN_FRONTEND=noninteractive apt-get install -q -y pdns-server pdns-backend-mysql mariadb-client && \
     rm /etc/powerdns/pdns.d/*.conf && rm /etc/powerdns/*.conf && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends cron jq && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends cron curl jq && \
     rm /etc/cron.daily/* && \
     mkdir /var/run/pdns && \
     apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
diff --git a/pdns/start.sh b/pdns/start.sh
index 57c48ab..88935fb 100644
--- a/pdns/start.sh
+++ b/pdns/start.sh
@@ -5,6 +5,8 @@ mkdir -p /etc/powerdns/pdns.d
 PDNSVARS=`echo ${!PDNSCONF_*}`
 touch /etc/powerdns/pdns.conf
 
+PDNSCONF_GMYSQL_HOST=${PDNSCONF_GMYSQL_HOST:-mysql}
+
 if [ ! -z $MYSQL_ENV_MARIADB_DATABASE ]; then
    PDNSCONF_GMYSQL_USER=$MYSQL_ENV_MARIADB_USER 
    PDNSCONF_GMYSQL_DBNAME=$MYSQL_ENV_MARIADB_DATABASE 
@@ -35,7 +37,7 @@ fi
 mysqlcheck() {
   # Wait for MySQL to be available...
   COUNTER=20
-  until mysql -h mysql -u $PDNSCONF_GMYSQL_USER -p$PDNSCONF_GMYSQL_PASSWORD -e "show databases" 2>/dev/null; do
+  until mysql -h "$PDNSCONF_GMYSQL_HOST" -u "$PDNSCONF_GMYSQL_USER" -p"$PDNSCONF_GMYSQL_PASSWORD" -e "show databases" 2>/dev/null; do
     echo "WARNING: MySQL still not up. Trying again..."
     sleep 10
     let COUNTER-=1
@@ -45,10 +47,10 @@ mysqlcheck() {
     fi
   done
 
-  count=`mysql -h mysql -u $PDNSCONF_GMYSQL_USER -p$PDNSCONF_GMYSQL_PASSWORD -e "select count(*) from information_schema.tables where table_type='BASE TABLE' and table_schema='$PDNSCONF_GMYSQL_DBNAME';" | tail -1`
+  count=`mysql -h "$PDNSCONF_GMYSQL_HOST" -u "$PDNSCONF_GMYSQL_USER" -p"$PDNSCONF_GMYSQL_PASSWORD" -e "select count(*) from information_schema.tables where table_type='BASE TABLE' and table_schema='$PDNSCONF_GMYSQL_DBNAME';" | tail -1`
   if [ "$count" == "0" ]; then
     echo "Database is empty. Importing PowerDNS schema..."
-    mysql -h mysql -u $PDNSCONF_GMYSQL_USER -p$PDNSCONF_GMYSQL_PASSWORD $PDNSCONF_GMYSQL_DBNAME < /usr/share/doc/pdns-backend-mysql/schema.mysql.sql && echo "Import done."
+    mysql -h "$PDNSCONF_GMYSQL_HOST" -u "$PDNSCONF_GMYSQL_USER" -p"$PDNSCONF_GMYSQL_PASSWORD" "$PDNSCONF_GMYSQL_DBNAME" < /usr/share/doc/pdns-backend-mysql/schema.mysql.sql && echo "Import done."
   fi
 }