diff --git a/root/defaults/system.properties b/root/defaults/system.properties
index 709e574..ab0084b 100644
--- a/root/defaults/system.properties
+++ b/root/defaults/system.properties
@@ -41,6 +41,6 @@
 # unifi.throughput.port=6789
 #
 db.mongo.local=false
-db.mongo.uri=mongodb://~MONGO_USER~:~MONGO_PASS~@~MONGO_HOST~:~MONGO_PORT~/~MONGO_DBNAME~?tls=~MONGO_TLS~~MONGO_AUTHSOURCE~
-statdb.mongo.uri=mongodb://~MONGO_USER~:~MONGO_PASS~@~MONGO_HOST~:~MONGO_PORT~/~MONGO_DBNAME~_stat?tls=~MONGO_TLS~~MONGO_AUTHSOURCE~
-unifi.db.name=~MONGO_DBNAME~
+db.mongo.uri=$MONGO_URI
+statdb.mongo.uri=$STAT_MONGO_URI
+unifi.db.name=$MONGO_DBNAME
diff --git a/root/etc/s6-overlay/s6-rc.d/init-unifi-network-application-config/run b/root/etc/s6-overlay/s6-rc.d/init-unifi-network-application-config/run
index fd28c3c..d9c5427 100755
--- a/root/etc/s6-overlay/s6-rc.d/init-unifi-network-application-config/run
+++ b/root/etc/s6-overlay/s6-rc.d/init-unifi-network-application-config/run
@@ -28,39 +28,11 @@ if [[ ! -L "/usr/lib/unifi/run" ]]; then
 fi
 
 if [[ ! -e /config/data/system.properties ]]; then
-    if [[ -z "${MONGO_HOST}" ]]; then
-        echo "*** No MONGO_HOST set, cannot configure database settings. ***"
+    if [[ -z "${MONGO_URI}" || -z "${STAT_MONGO_URI}" || -z "${MONGO_DBNAME}" ]]; then
+        echo "*** Required environments are not set, cannot configure database settings. ***"
         sleep infinity
     else
-        echo "*** Waiting for MONGO_HOST ${MONGO_HOST} to be reachable. ***"
-        DBCOUNT=0
-        while true; do
-            if nc -w1 "${MONGO_HOST}" "${MONGO_PORT}" >/dev/null 2>&1; then
-                break
-            fi
-            DBCOUNT=$((DBCOUNT+1))
-            if [[ ${DBCOUNT} -gt 6 ]]; then
-                echo "*** Defined MONGO_HOST ${MONGO_HOST} is not reachable, cannot proceed. ***"
-                sleep infinity
-            fi
-            sleep 5
-        done
-        sed -i "s/~MONGO_USER~/${MONGO_USER}/" /defaults/system.properties
-        sed -i "s/~MONGO_HOST~/${MONGO_HOST}/" /defaults/system.properties
-        sed -i "s/~MONGO_PORT~/${MONGO_PORT}/" /defaults/system.properties
-        sed -i "s/~MONGO_DBNAME~/${MONGO_DBNAME}/" /defaults/system.properties
-        sed -i "s/~MONGO_PASS~/${MONGO_PASS}/" /defaults/system.properties
-        if [[ "${MONGO_TLS,,}" = "true" ]]; then
-            sed -i "s/~MONGO_TLS~/true/" /defaults/system.properties
-        else
-            sed -i "s/~MONGO_TLS~/false/" /defaults/system.properties
-        fi
-        if [[ -z "${MONGO_AUTHSOURCE}" ]]; then
-            sed -i "s/~MONGO_AUTHSOURCE~//" /defaults/system.properties
-        else
-            sed -i "s/~MONGO_AUTHSOURCE~/\&authSource=${MONGO_AUTHSOURCE}/" /defaults/system.properties
-        fi
-        cp /defaults/system.properties /config/data
+        envsubst < /defaults/system.properties > /config/data/system.properties
     fi
 fi