diff --git a/.env.dev b/.env.dev
index e430174d..7cfaecd8 100644
--- a/.env.dev
+++ b/.env.dev
@@ -5,6 +5,15 @@ APP_KEY=someRandomStringWith32Characters
 APP_DEBUG=true
 APP_DEMO=false
 
+# The URL under which LinkAce is accessible, e.g. https://links.example.com
+APP_URL=http://localhost
+
+## Trusted Proxies and Hosts
+# Set to the IP of your reverse proxy if running behind one (e.g. nginx, Traefik).
+# Use a comma-separated list for multiple proxies: 192.168.1.1,10.0.0.1
+# Use * to trust the immediate upstream connection (any single reverse proxy).
+TRUSTED_PROXIES=*
+
 ## Database configuration
 DB_CONNECTION=mysql
 DB_HOST=db
diff --git a/.env.docker.production b/.env.docker.production
index 847ac5b2..0f97d927 100644
--- a/.env.docker.production
+++ b/.env.docker.production
@@ -3,6 +3,16 @@
 # The app key is generated later, please leave it like that
 APP_KEY=someRandomStringWith32Characters
 
+# The URL under which LinkAce is accessible, e.g. https://links.example.com
+# Used when generating links in emails and other notifications
+APP_URL=http://localhost
+
+## Trusted Proxies and Hosts
+# Set to the IP of your reverse proxy if running behind one (e.g. nginx, Traefik).
+# Use a comma-separated list for multiple proxies: 192.168.1.1,10.0.0.1
+# Use * to trust the immediate upstream connection (any single reverse proxy).
+TRUSTED_PROXIES=*
+
 ## Configuration of the database connection
 # Set the database driver (mysql, pgsql, sqlsrv, sqlite)
 DB_CONNECTION=mysql
diff --git a/.env.example b/.env.example
index a633b58c..788c4821 100644
--- a/.env.example
+++ b/.env.example
@@ -12,8 +12,7 @@ APP_URL=http://localhost
 # Set to the IP of your reverse proxy if running behind one (e.g. nginx, Traefik).
 # Use a comma-separated list for multiple proxies: 192.168.1.1,10.0.0.1
 # Use * to trust the immediate upstream connection (any single reverse proxy).
-# Leave empty if LinkAce is accessed directly without a reverse proxy.
-TRUSTED_PROXIES=
+TRUSTED_PROXIES=*
 
 ## Configuration of the database connection
 ## Attention: Those settings are configured during the web setup, please do not modify them now.
diff --git a/.env.sqlite.production b/.env.sqlite.production
index 5925525b..0548b246 100644
--- a/.env.sqlite.production
+++ b/.env.sqlite.production
@@ -4,6 +4,16 @@
 # The app key is generated later, please leave it like that
 APP_KEY=someRandomStringWith32Characters
 
+# The URL under which LinkAce is accessible, e.g. https://links.example.com
+# Used when generating links in emails and other notifications
+APP_URL=http://localhost
+
+## Trusted Proxies and Hosts
+# Set to the IP of your reverse proxy if running behind one (e.g. nginx, Traefik).
+# Use a comma-separated list for multiple proxies: 192.168.1.1,10.0.0.1
+# Use * to trust the immediate upstream connection (any single reverse proxy).
+TRUSTED_PROXIES=*
+
 ## Configuration of the database connection
 # Set the database driver (mysql, pgsql, sqlsrv, sqlite)
 DB_CONNECTION=sqlite