diff --git a/README.md b/README.md
index 89a387f..854fa32 100644
--- a/README.md
+++ b/README.md
@@ -75,6 +75,10 @@ Nginx keepalive settings. Timeout should be set higher (10s+) if you have more p
 
 This value determines the largest file upload possible, as uploads are passed through Nginx before hitting a backend like `php-fpm`. If you get an error like `client intended to send too large body`, it means this value is set too low.
 
+    nginx_server_names_hash_bucket_size: "64"
+
+If you have many server names, or have very long server names, you might get an Nginx error on startup requiring this value to be increased.
+
     nginx_proxy_cache_path: ""
 
 Set as the `proxy_cache_path` directive in the `nginx.conf` file. By default, this will not be configured (if left as an empty string), but if you wish to use Nginx as a reverse proxy, you can set this to a valid value (e.g. `"/var/cache/nginx keys_zone=cache:32m"`) to use Nginx's cache (further proxy configuration can be done in individual server configurations).
diff --git a/defaults/main.yml b/defaults/main.yml
index 7c7c893..620dc09 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -25,6 +25,8 @@ nginx_keepalive_requests: "100"
 
 nginx_client_max_body_size: "64m"
 
+nginx_server_names_hash_bucket_size: "64"
+
 nginx_proxy_cache_path: ""
 
 nginx_extra_conf_options: ""
diff --git a/templates/nginx.conf.j2 b/templates/nginx.conf.j2
index 8213eec..e9499e7 100644
--- a/templates/nginx.conf.j2
+++ b/templates/nginx.conf.j2
@@ -18,7 +18,7 @@ http {
     include       {{ nginx_mime_file_path }};
     default_type  application/octet-stream;
 
-    server_names_hash_bucket_size 64;
+    server_names_hash_bucket_size {{ nginx_server_names_hash_bucket_size }};
 
     client_max_body_size {{ nginx_client_max_body_size }};