diff --git a/.env.docker b/.env.docker
index 9e50383014..4865f8e13a 100644
--- a/.env.docker
+++ b/.env.docker
@@ -97,7 +97,7 @@ API_TOKEN_EXPIRATION_YEARS=40
 # --------------------------------------------
 # OPTIONAL: SECURITY HEADER SETTINGS
 # --------------------------------------------
-APP_TRUSTED_PROXIES=192.168.1.1,10.0.0.1,172.0.0.0/8
+APP_TRUSTED_PROXIES=192.168.1.1,10.0.0.1,172.16.0.0/12
 ALLOW_IFRAMING=false
 REFERRER_POLICY=same-origin
 ENABLE_CSP=false