diff --git a/eng/Versions.props b/eng/Versions.props
index 782a4bb6..a42454f4 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -1,13 +1,13 @@
 <Project>
 
   <PropertyGroup>
-    <MajorVersion>3</MajorVersion>
-    <MinorVersion>1</MinorVersion>
+    <MajorVersion>4</MajorVersion>
+    <MinorVersion>0</MinorVersion>
     <PatchVersion>0</PatchVersion>
     <VersionPrefix>$(MajorVersion).$(MinorVersion).$(PatchVersion)</VersionPrefix>
-    <PreReleaseVersionLabel>alpha1</PreReleaseVersionLabel>
+    <PreReleaseVersionLabel>preview1</PreReleaseVersionLabel>
     <PreReleaseVersionIteration></PreReleaseVersionIteration>
-    <PreReleaseBrandingLabel>Alpha 1</PreReleaseBrandingLabel>
+    <PreReleaseBrandingLabel>Preview 1</PreReleaseBrandingLabel>
     <StabilizePackageVersion Condition=" '$(StabilizePackageVersion)' == '' ">false</StabilizePackageVersion>
     <DotNetFinalVersionKind Condition=" '$(StabilizePackageVersion)' == 'true' ">release</DotNetFinalVersionKind>
     <IncludePreReleaseLabelInPackageVersion>true</IncludePreReleaseLabelInPackageVersion>