diff --git a/data/nginx-relay/nginx.conf b/data/nginx-relay/nginx.conf
index aa9b920..dabd8bb 100644
--- a/data/nginx-relay/nginx.conf
+++ b/data/nginx-relay/nginx.conf
@@ -7,6 +7,7 @@ events {
 }
 
 stream {
+    map_hash_bucket_size 128;
     map $ssl_preread_server_name $name {
         chat.signal.org                         signal-service;
         ud-chat.signal.org                      signal-service;