diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index caf08fc12..d91dfc473 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -26,9 +26,9 @@
       <Uri>https://github.com/dotnet/toolset</Uri>
       <Sha>de6587837888584f67b0d4fe389c40e704c19e9f</Sha>
     </Dependency>
-    <Dependency Name="NETStandard.Library" Version="2.1.0-prerelease.19115.2">
+    <Dependency Name="NETStandard.Library" Version="2.1.0-prerelease.19121.1">
       <Uri>https://github.com/dotnet/standard</Uri>
-      <Sha>c7d28d6deb07cb9c6619e5ba3228b61516775e48</Sha>
+      <Sha>f327303a6b9ee92133b8a75fe64341472c729e4d</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DotNet.MSBuildSdkResolver" Version="3.0.100-preview4.19111.1">
       <Uri>https://github.com/dotnet/cli</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index 6a436c584..52853437a 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -36,7 +36,7 @@
     <MicrosoftNETCoreDotNetHostResolverPackageVersion>$(MicrosoftNETCoreAppPackageVersion)</MicrosoftNETCoreDotNetHostResolverPackageVersion>
   </PropertyGroup>
   <PropertyGroup>
-    <NETStandardLibraryPackageVersion>2.1.0-prerelease.19115.2</NETStandardLibraryPackageVersion>
+    <NETStandardLibraryPackageVersion>2.1.0-prerelease.19121.1</NETStandardLibraryPackageVersion>
   </PropertyGroup>
   <PropertyGroup>
     <MicrosoftDotNetCommonItemTemplatesPackageVersion>1.0.2-beta5.19115.3</MicrosoftDotNetCommonItemTemplatesPackageVersion>