diff --git a/admin_manual/installation/nginx-subdir.conf.sample b/admin_manual/installation/nginx-subdir.conf.sample
index 4ac313df5..0ce5efb42 100644
--- a/admin_manual/installation/nginx-subdir.conf.sample
+++ b/admin_manual/installation/nginx-subdir.conf.sample
@@ -24,10 +24,12 @@ server {
 }
 
 server {
-    listen 443      ssl;
-    http2 on;
-    listen [::]:443 ssl;
-    http2 on;
+    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