diff --git a/docker-compose.yml b/docker-compose.yml
index a3e614d..ba99289 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -117,6 +117,7 @@ services:
             - MATOMO_ENDPOINT
             - MATOMO_SITE_ID
             - MICROSOFT_API_APP_CLIENT_ID
+            - NGINX_KEEPALIVE_TIMEOUT
             - NGINX_RESOLVER
             - NGINX_WORKER_PROCESSES
             - NGINX_WORKER_CONNECTIONS
diff --git a/web/rootfs/defaults/nginx.conf b/web/rootfs/defaults/nginx.conf
index 3e1cf9f..acfbbe5 100644
--- a/web/rootfs/defaults/nginx.conf
+++ b/web/rootfs/defaults/nginx.conf
@@ -17,7 +17,7 @@ http {
 	sendfile on;
 	tcp_nopush on;
 	tcp_nodelay on;
-	keepalive_timeout 65;
+	keepalive_timeout {{ .Env.NGINX_KEEPALIVE_TIMEOUT | default "65" }};
 	types_hash_max_size 2048;
 	server_tokens off;