diff --git a/developer/building/qubes-builder.md b/developer/building/qubes-builder.md
index 31755705..58573dea 100644
--- a/developer/building/qubes-builder.md
+++ b/developer/building/qubes-builder.md
@@ -13,7 +13,7 @@ title: Qubes builder
 <div class="alert alert-warning" role="alert">
   <i class="fa fa-exclamation-circle"></i>
   <b>Note:</b> These instructions concern the older Qubes builder (v1). It supports
-  only building Qubes 4.1 or earlier.<br>The build process has been completely rewritten in <a href="https://github.com/QubesOS/qubes-builderv2/">qubes-builder v2</a>. This can be used for building Qubes R4.1 and later, and all related components.
+  only building Qubes 4.2 or earlier.<br>The build process has been completely rewritten in <a href="https://github.com/QubesOS/qubes-builderv2/">qubes-builder v2</a>. This can be used for building Qubes R4.2 and later, and all related components.
 </div>
 
 **Note: See [ISO building instructions](/doc/qubes-iso-building/) for a streamlined overview on how to use the build system.**
diff --git a/developer/building/qubes-iso-building.md b/developer/building/qubes-iso-building.md
index a8d6cd57..7b131bed 100644
--- a/developer/building/qubes-iso-building.md
+++ b/developer/building/qubes-iso-building.md
@@ -15,7 +15,7 @@ title: Qubes ISO building
 <div class="alert alert-warning" role="alert">
   <i class="fa fa-exclamation-circle"></i>
   <b>Note:</b> These instructions concern the older Qubes builder (v1). It supports
-  only building Qubes 4.1 or earlier.<br>The build process has been completely rewritten in <a href="https://github.com/QubesOS/qubes-builderv2/">qubes-builder v2</a>. This can be used for building Qubes R4.1 and later, and all related components.
+  only building Qubes 4.2 or earlier.<br>The build process has been completely rewritten in <a href="https://github.com/QubesOS/qubes-builderv2/">qubes-builder v2</a>. This can be used for building Qubes R4.2 and later versions, and all related components.
 </div>
 
 Build Environment