diff --git a/lua/rocks/config/internal.lua b/lua/rocks/config/internal.lua
index 2d8bf6d..b505aef 100644
--- a/lua/rocks/config/internal.lua
+++ b/lua/rocks/config/internal.lua
@@ -105,7 +105,8 @@ local default_config = {
     end,
     ---@return server_url[]
     get_all_servers = function()
-        return vim.list_extend(config.get_servers(), config.get_dev_servers())
+        local servers = {}
+        return vim.list_extend(vim.list_extend(servers, config.get_servers()), config.get_dev_servers())
     end,
     ---@param user_rocks table<rock_name, RockSpec>
     ---@return table<rock_name, RockSpec>