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>
diff --git a/docs/relnotes/11.2.0.html b/docs/relnotes/11.2.0.html
index 069eca2..baedb4c 100644
--- a/docs/relnotes/11.2.0.html
+++ b/docs/relnotes/11.2.0.html
@@ -74,6 +74,10 @@
<h2>Changes</h2>
+Microsoft Visual Studio 2013 or later is now required for building
+on Windows.
+Previously, Visual Studio 2008 and later were supported.
+
TBD.
</div>