diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 4e458231a..9351eb20c 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -46,9 +46,9 @@
       <Uri>https://github.com/dotnet/toolset</Uri>
       <Sha>ae1b3f634179a31b5ff36780efae2e28b0b388ea</Sha>
     </Dependency>
-    <Dependency Name="NETStandard.Library" Version="2.1.0-prerelease.19208.1">
+    <Dependency Name="NETStandard.Library" Version="2.1.0-prerelease.19209.1">
       <Uri>https://github.com/dotnet/standard</Uri>
-      <Sha>16f3d7537987f094cac266152a17e8ed6c4c440f</Sha>
+      <Sha>17f3e55f67068d8a9f8b37e5982060c0c0df5fb4</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DotNet.MSBuildSdkResolver" Version="3.0.100-preview5.19208.3">
       <Uri>https://github.com/dotnet/cli</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index 711cf124b..22759f2c2 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -41,7 +41,7 @@
     <MicrosoftNETCoreDotNetHostResolverPackageVersion>$(MicrosoftNETCoreAppPackageVersion)</MicrosoftNETCoreDotNetHostResolverPackageVersion>
   </PropertyGroup>
   <PropertyGroup>
-    <NETStandardLibraryPackageVersion>2.1.0-prerelease.19208.1</NETStandardLibraryPackageVersion>
+    <NETStandardLibraryPackageVersion>2.1.0-prerelease.19209.1</NETStandardLibraryPackageVersion>
     <!-- Use a different property name here, as NETStandardLibraryPackageVersion is also set by targets in the NETStandard.Library package,
          which ends up overriding the value set here. -->
     <NETSTandardTargetingPackVersion>$(NETStandardLibraryPackageVersion)</NETSTandardTargetingPackVersion>