diff --git a/rails-prod-Dockerfile b/rails-prod-Dockerfile
index e94b462..2aef2b2 100644
--- a/rails-prod-Dockerfile
+++ b/rails-prod-Dockerfile
@@ -72,7 +72,7 @@ RUN a2ensite default-ssl.conf
 # Add apache tuning stuff
 RUN echo PassengerMaxPoolSize 3 >> /etc/apache2/apache2.conf
 RUN echo PassengerMinInstances  3 >> /etc/apache2/apache2.conf
-RUN echo PassengerPreStart >> /etc/apache2/apache2.conf
+RUN echo PassengerPreStart *:443 >> /etc/apache2/apache2.conf
 
 # By default, simply start apache.
 CMD /usr/sbin/apache2ctl -D FOREGROUND