diff --git a/configure-instance.sh b/configure-instance.sh
index 649a687..e701c36 100755
--- a/configure-instance.sh
+++ b/configure-instance.sh
@@ -3,7 +3,14 @@ echo "Enter a hostname for the Frontend (eg: piped.kavin.rocks):" && read -r fro
 echo "Enter a hostname for the Backend (eg: pipedapi.kavin.rocks):" && read -r backend
 echo "Enter a hostname for the Proxy (eg: pipedproxy.kavin.rocks):" && read -r proxy
 echo "Enter the reverse proxy you would like to use (either caddy or nginx):" && read -r reverseproxy
-echo "Enter a port to use for the reverse proxy:" && read -r port
+port=8080 # Define default port
+if [[ $reverseproxy = "nginx" ]]; then # if the nginx reverse proxy is used, we want to get a custom port
+    echo "Enter a port to use for the reverse proxy:" && read -r port
+fi
+integerregex='^[0-9]+$'
+if ! [[ $port =~ $integerregex ]] ; then # ensure that the port is an integer. If it is not set it to the default.
+    port=8080
+fi
 
 rm -rf config/
 rm -f docker-compose.yml