diff --git a/plugins/00_dokku-standard/commands b/plugins/00_dokku-standard/commands
index fe558aa51..6f8ca6642 100755
--- a/plugins/00_dokku-standard/commands
+++ b/plugins/00_dokku-standard/commands
@@ -36,13 +36,8 @@ case "$1" in
       dockerfile)
         # extract first port from Dockerfile
         DOCKERFILE_PORT=$(grep EXPOSE Dockerfile | head -1 | awk '{ print $2 }')
-        if [[ -n "$DOCKERFILE_PORT" ]];then
-          if [[ -f "$DOKKU_ROOT/$APP/ENV" ]] && [[ "$(grep DOKKU_DOCKERFILE_PORT $DOKKU_ROOT/$APP/ENV) > /dev/null 2>&1; echo $?" == "0" ]];then
-            sed  -i -e "s:DOKKU_DOCKERFILE_PORT=.*:DOKKU_DOCKERFILE_PORT=$DOCKERFILE_PORT:g" "$DOKKU_ROOT/$APP/ENV"
-          else
-            echo "export DOKKU_DOCKERFILE_PORT=$DOCKERFILE_PORT" >> "$DOKKU_ROOT/$APP/ENV"
-          fi
-        fi
+        [[ -n "$DOCKERFILE_PORT" ]] && dokku config:set-norestart $APP DOKKU_DOCKERFILE_PORT=$DOCKERFILE_PORT
+
         # sticking with same pattern of building app image before pre-build for now.
         docker build -t "$IMAGE" .
         # buildstep pluginhooks don't necessarily make sense for dockerfiles. call the new breed!!!