diff --git a/admin_manual/installation/nginx-root.conf.sample b/admin_manual/installation/nginx-root.conf.sample
index 550364749..93260e100 100644
--- a/admin_manual/installation/nginx-root.conf.sample
+++ b/admin_manual/installation/nginx-root.conf.sample
@@ -22,8 +22,12 @@ server {
 }
 
 server {
-    listen 443      ssl http2;
+    listen 443 ssl http2;
     listen [::]:443 ssl http2;
+    # With NGinx >= 1.25.1 you should use this instead:
+    # listen 443      ssl;
+    # listen [::]:443 ssl;
+    # http2 on;
     server_name cloud.example.com;
 
     # Path to the root of your installation
diff --git a/admin_manual/installation/nginx-subdir.conf.sample b/admin_manual/installation/nginx-subdir.conf.sample
index da9b56d48..0ce5efb42 100644
--- a/admin_manual/installation/nginx-subdir.conf.sample
+++ b/admin_manual/installation/nginx-subdir.conf.sample
@@ -26,6 +26,10 @@ server {
 server {
     listen 443      ssl http2;
     listen [::]:443 ssl http2;
+    # With NGinx >= 1.25.1 you should use this instead:
+    # listen 443      ssl;
+    # listen [::]:443 ssl;
+    # http2 on;
     server_name cloud.example.com;
 
     # Path to the root of the domain