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(This article was first published on <strong><a href="https://blog.rstudio.com/2017/09/12/shiny-server-pro-1-5-4/"> RStudio Blog</a></strong>, and kindly contributed to <a rel="nofollow" href="https://www.r-bloggers.com/">R-bloggers)</a> </div>
<p><a rel="nofollow" href="https://www.rstudio.com/products/shiny/shiny-server/" target="_blank">Shiny Server 1.5.4.869 and Shiny Server Pro 1.5.4.872 are now available.</a></p>
<p>Both the new Shiny Server and Shiny Server Pro releases include bug fixes and enhancements, and we recommend upgrading at your earliest convenience.</p>
<h3>Shiny Server 1.5.4.869</h3>
<ul>
<li><a rel="nofollow" href="http://docs.rstudio.com/shiny-server/#clickjacking-protection" target="_blank">Clickjacking protection</a> can now be enabled using the <code>frame_options</code> directive. This directive was already available in Shiny Server Pro, but is now available in Shiny Server as well.</li>
<li>A bug that caused <code>&quot;Error: Can't set headers after they are sent.&quot;</code> to appear in error logs was fixed.</li>
<li>Several bugs in <code>license-manager</code> were fixed.</li>
</ul>
<h3>Shiny Server Pro 1.5.4.872</h3>
<ul>
<li>The “utilization scheduler” component, which manages the way requests are routed to R processes, has been significantly improved. It has been made more robust, and applications now respond more efficiently to increased load.</li>
<li><code>auth_pam</code>: The performance of multiple simultaneous logins was improved.</li>
<li><code>auth_ldap</code>: A bug was fixed that caused LDAP to return no groups when a username contained a backslash.</li>
</ul>
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