diff --git a/tooling/Microsoft.VisualStudio.BlazorExtension/Properties/AssemblyInfo.cs b/tooling/Microsoft.VisualStudio.BlazorExtension/Properties/AssemblyInfo.cs
index 7071f5020d..62755d1c9b 100644
--- a/tooling/Microsoft.VisualStudio.BlazorExtension/Properties/AssemblyInfo.cs
+++ b/tooling/Microsoft.VisualStudio.BlazorExtension/Properties/AssemblyInfo.cs
@@ -20,12 +20,12 @@ using Microsoft.VisualStudio.Shell;
     GenerateCodeBase = true,
     PublicKeyToken = "",
     OldVersionLowerBound = "0.0.0.0",
-    OldVersionUpperBound = "0.3.0.0",
-    NewVersion = "0.3.0.0")]
+    OldVersionUpperBound = "0.4.0.0",
+    NewVersion = "0.4.0.0")]
 [assembly: ProvideBindingRedirection(
     AssemblyName = "Microsoft.VisualStudio.LanguageServices.Blazor",
     GenerateCodeBase = true,
     PublicKeyToken = "",
     OldVersionLowerBound = "0.0.0.0",
-    OldVersionUpperBound = "0.3.0.0",
-    NewVersion = "0.3.0.0")]
+    OldVersionUpperBound = "0.4.0.0",
+    NewVersion = "0.4.0.0")]
diff --git a/version.props b/version.props
index 3e4003313d..cb06e9617a 100644
--- a/version.props
+++ b/version.props
@@ -1,5 +1,8 @@
 <Project>
   <PropertyGroup>
+    <!-- When editing any version prefix here, remember also to update
+         tooling\Microsoft.VisualStudio.BlazorExtension\Properties\AssemblyInfo.cs
+         to include the new version in its upper bounds -->
     <IsFinalBuild>false</IsFinalBuild>
     <VersionPrefix>0.4.0</VersionPrefix>
     <VersionSuffix>preview1</VersionSuffix>