diff --git a/conf_script.sh b/conf_script.sh
index cff1cc0..7728eea 100644
--- a/conf_script.sh
+++ b/conf_script.sh
@@ -1,12 +1,12 @@
 #!/bin/bash
 
-if [ -n "$HEROKU_APP_ID" ] && [ -n "$HEROKU_APP_NAME" ]; then
-  APP_URL="https://${HEROKU_APP_NAME}-${HEROKU_APP_ID}.herokuapp.com/"
+if [ -n "$HEROKU_APP_DEFAULT_DOMAIN_NAME" ]; then
+  APP_URL="https://${HEROKU_APP_DEFAULT_DOMAIN_NAME}"
 else
   if [ -f /app/app_link.txt ]; then
     APP_URL=$(cat /app/app_link.txt)
   else
-    echo "Neither HEROKU_APP_NAME/ID nor /app/app_link.txt is available. Exiting."
+    echo "Neither HEROKU_APP_DEFAULT_DOMAIN_NAME nor /app/app_link.txt is available. Exiting."
     exit 1
   fi
 fi