 <p>You have to choose one way of the following :</p> <p>Re-installing a package by it's name in all solution's projects:</p> <pre><code>Update-Package –reinstall &lt;packageName&gt; </code></pre> <p>Re-installing a package by it's name and ignoring it's dependencies in all solution's projects:</p> <pre><code>Update-Package –reinstall &lt;packageName&gt; -ignoreDependencies </code></pre> <p>Re-installing a package by it's name in a project:</p> <pre><code>Update-Package –reinstall &lt;packageName&gt; &lt;projectName&gt; </code></pre> <p>Re-installing all packages in a specific project:</p> <pre><code>Update-Package -reinstall -ProjectName &lt;projectName&gt; </code></pre> <p>Re-installing all packages in a solution:</p> <pre><code>Update-Package -reinstall </code></pre>