docs: Visual Studio 2013 or later is now required
diff --git a/docs/install.html b/docs/install.html
index c826d64..ae911d5 100644
--- a/docs/install.html
+++ b/docs/install.html
@@ -58,6 +58,9 @@
 For MSVC on Windows, install
 <a href="http://winflexbison.sourceforge.net/">Win flex-bison</a>.
 </li>
+<br>
+<li>For building on Windows, Microsoft Visual Studio 2013 or later is required.
+</li>
 </ul>