diff --git a/docker-compose.yml b/docker-compose.yml
index 8bc4d5e..5c34476 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -15,4 +15,4 @@ services:
             DB_BASE: ${KIMAI_DB_NAME:?err}
             DB_USER: ${KIMAI_DB_USER:?err}
             DB_PASS: ${KIMAI_DB_PASSWORD:?err}
-            TRUSTED_HOSTS: localhost,127.0.0.1,${KIMAI_HOST_IP_ADDRESS:-127.0.0.1}
+            TRUSTED_HOSTS: localhost,127.0.0.1,${KIMAI_HOST_IP_ADDRESS:-127.0.0.1},${KIMAI_PUBLIC_URL:?err}
diff --git a/setup b/setup
index f16be5d..3771a68 100755
--- a/setup
+++ b/setup
@@ -24,6 +24,7 @@ KIMAI_CONTAINER_NAME="${KIMAI_PROJECT_NAME}_core"
 KIMAI_VERSION=""
 KIMAI_HOST_IP_ADDRESS=""
 KIMAI_HOST_PORT=""
+KIMAI_PUBLIC_URL=""
 KIMAI_SUPERADMIN_MAIL=""
 KIMAI_SUPERADMIN_PASSWORD=""
 KIMAI_DB_HOST=""
@@ -56,6 +57,7 @@ if [ $CONFIG_EXISTS == "false" ] || [ $USE_EXISTING_CONFIG == "n" ]; then
     read -p "Enter kimai version which should be used: " KIMAI_VERSION
     read -p "Enter host (vm) ip address on which kimai should be accessible: " KIMAI_HOST_IP_ADDRESS
     read -p "Enter host (vm) port on which kimai should be accessible: " KIMAI_HOST_PORT
+    read -p "Enter public url on which kimai should be accessible: " KIMAI_PUBLIC_URL
     read -p "Enter superadmin mail address for kimai: " KIMAI_SUPERADMIN_MAIL
     read -p "Enter superadmin password for kimai: " KIMAI_SUPERADMIN_PASSWORD
     read -p "Enter database host for kimai: " KIMAI_DB_HOST