 <p>When you add a Script Task or Component to an SSIS package, there is a template in your installation folder that SSIS uses.</p> <p>For 2012, it'd be in <code>Program Files (x86)\Microsoft SQL Server\110\DTS\Binn</code></p> <p>In there, you have a VSTA11_IS_ST_CS_Template.vstax file which is just an uncompressed zip. </p> <ol> <li>Unzip that somewhere safe, </li> <li>Modify line 14 of <code>IS%20Script%20Task%20Project.csproj</code> </li> <li>Rezip it without compression </li> <li>Copy it back into the source folder</li> </ol> <p>I blogged a similar approach with <a href="http://billfellows.blogspot.com/2015/02/slimming-down-ssis-script-task.html" rel="nofollow">Slimming down the SSIS Script Task</a></p> <p>The specific attribute you're looking to modify in the project file is</p> <pre><code>&lt;TargetFrameworkVersion&gt;v4.0&lt;/TargetFrameworkVersion&gt; </code></pre> <p>What you wanted to change it to, you never specified</p>