diff --git a/deploy/nginx/kadence.timka.su.conf b/deploy/nginx/kadence.timka.su.conf
index b6be7be..6e59cbe 100644
--- a/deploy/nginx/kadence.timka.su.conf
+++ b/deploy/nginx/kadence.timka.su.conf
@@ -29,9 +29,10 @@ server {
 }
 
 server {
-    listen 443 ssl;
-    listen [::]:443 ssl;
-    http2 on;
+    # `listen ... http2` rather than the `http2 on;` directive: this host runs
+    # nginx 1.24, and `http2 on` only arrived in 1.25.1.
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
     server_name kadence.timka.su;
 
     ssl_certificate     /etc/letsencrypt/live/kadence.timka.su/fullchain.pem;