Searching only posts and not pages!

I need help with my site:
https://www.llamawiki.com/en

The search box at the top is only searching posts and not pages.
I want the search box to search for pages, for I don’t have nor will not be creating posts.

I have no plugins.

Here’s my search.php:

<?php get_header(); ?>

<div id="content" class="clearfix">
  <div id="main" class="col-sm-8 clearfix" role="main">
    <div id="home-main" class="home-main home">
      <header>
        <div class="page-catheader cat-catheader">
            <h4 class="cat-title">
				<?php printf( __( 'Search : %s', 'redpro' ), '<span>' . get_search_query() . '</span>' ); ?>
            </h4>
         </div>
      </header>
      <?php if (function_exists('mywiki_custom_breadcrumbs')) mywiki_custom_breadcrumbs(); ?>
      <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
      <article id="post-<?php the_ID(); ?>" <?php post_class('clearfix'); ?> role="article">
        <header>
            <div class="cat-hadding">
                 <a href="<?php the_permalink() ?>" rel="bookmark" title="<?php the_title_attribute(); ?>"><?php the_title();?></a>
            </div>

<?php
	$title 	= get_the_title();
	$keys= explode(" ",$s);
	$title 	= preg_replace('/('.implode('|', $keys) .')/iu',
		'<strong class="search-excerpt"></strong>',
		$title);
?>

            <p class="meta post-meta-entry"><?php mywiki_entry_meta(); ?></p>
            <p class="meta post-meta-entry"><?php the_tags(); ?></p>

        </header>
        <!-- end article header -->

        <section class="post_content">
          <?php the_post_thumbnail( 'wpbs-featured' ); ?>
          <?php the_excerpt(); ?>
        </section>
        <!-- end article section -->

      </article>
      <!-- end article -->

      <?php endwhile; ?>
	  <?php endif; ?>
      <nav class="mywiki-nav">
                <span class="mywiki-nav-previous"><?php previous_posts_link(); ?></span>
                <span class="mywiki-nav-next"><?php next_posts_link(); ?></span>
			</nav>

    </div>
  </div>
  <!-- end #main -->

  <?php get_sidebar(); ?>
</div>
<!-- end #content -->

<?php get_footer(); ?>