diff --git a/CHANGELOG.md b/CHANGELOG.md
index da4b767..0a7503f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [1.2.1] / 2024-08-05
+- Update to build for base version Revit 2017, 2019, 2021 and 2025.
+
 ## [1.2.0] / 2024-07-30
 - Update `ricaun.Revit.UI` to version 0.7.0 to update theme image.
 
@@ -19,6 +22,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - First Release
 
 [vNext]: ../../compare/1.0.0...HEAD
+
+[1.2.1]: ../../compare/1.2.0...1.2.1
 [1.2.0]: ../../compare/1.1.0...1.2.0
 [1.1.0]: ../../compare/1.0.0...1.1.0
 [1.0.0]: ../../compare/1.0.0
\ No newline at end of file
diff --git a/RevitAddin.VisualStudioDebug/RevitAddin.VisualStudioDebug.csproj b/RevitAddin.VisualStudioDebug/RevitAddin.VisualStudioDebug.csproj
index 14ad2c4..dd043f0 100644
--- a/RevitAddin.VisualStudioDebug/RevitAddin.VisualStudioDebug.csproj
+++ b/RevitAddin.VisualStudioDebug/RevitAddin.VisualStudioDebug.csproj
@@ -22,14 +22,24 @@
 
   <!-- RevitVersion -->
   <PropertyGroup>
-    <TargetFrameworks>net46;net8.0-windows</TargetFrameworks>
+    <TargetFrameworks>net46;net47;net48;net8.0-windows</TargetFrameworks>
   </PropertyGroup>
   <Choose>
-    <When Condition="$(TargetFramework.StartsWith('net4'))">
+    <When Condition="$(TargetFramework.StartsWith('net46'))">
       <PropertyGroup>
         <RevitVersion>2017</RevitVersion>
       </PropertyGroup>
     </When>
+    <When Condition="$(TargetFramework.StartsWith('net47'))">
+      <PropertyGroup>
+        <RevitVersion>2019</RevitVersion>
+      </PropertyGroup>
+    </When>
+    <When Condition="$(TargetFramework.StartsWith('net48'))">
+      <PropertyGroup>
+        <RevitVersion>2021</RevitVersion>
+      </PropertyGroup>
+    </When>
     <Otherwise>
       <PropertyGroup>
         <RevitVersion>2025</RevitVersion>
@@ -63,7 +73,7 @@
 
   <PropertyGroup>
     <PackageId>RevitAddin.VisualStudioDebug</PackageId>
-    <Version>1.2.0</Version>
+    <Version>1.2.1</Version>
     <ProjectGuid>{C917B240-4C2B-431A-BB03-730BE9802F25}</ProjectGuid>
   </PropertyGroup>