diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 1465641453..936ea76f65 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -113,9 +113,9 @@
       <Uri>https://github.com/dotnet/corefx</Uri>
       <Sha>6e224b7e166462744fe14db9de94ec60bc52c88a</Sha>
     </Dependency>
-    <Dependency Name="NETStandard.Library" Version="2.1.0-prerelease.19454.3">
+    <Dependency Name="NETStandard.Library" Version="2.1.0-prerelease.19454.4">
       <Uri>https://github.com/dotnet/standard</Uri>
-      <Sha>d3813d4fb0838dbfaaffdd930211e551580ec81d</Sha>
+      <Sha>f3b1db40ac53eab80c96c3cfa784f5c38bb02d4a</Sha>
     </Dependency>
     <Dependency Name="Microsoft.NETCore.Runtime.CoreCLR" Version="3.0.0-rc1.19430.3">
       <Uri>https://github.com/dotnet/coreclr</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index 06d03bcc0e..f4592f2c23 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -70,7 +70,7 @@
     <SystemThreadingAccessControlVersion>4.6.0-rc1.19454.1</SystemThreadingAccessControlVersion>
     <SystemWindowsExtensionsPackageVersion>4.6.0-rc1.19454.1</SystemWindowsExtensionsPackageVersion>
     <!-- standard -->
-    <NETStandardLibraryPackageVersion>2.1.0-prerelease.19454.3</NETStandardLibraryPackageVersion>
+    <NETStandardLibraryPackageVersion>2.1.0-prerelease.19454.4</NETStandardLibraryPackageVersion>
     <!-- coreclr -->
     <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>3.0.0-rc1.19430.3</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
     <!-- winforms -->