diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 1d4e6f358addc4..17dad80039a03a 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -24,9 +24,9 @@
       <Uri>https://github.com/dotnet/core-setup</Uri>
       <Sha>8743c312a9d1ce4035140046d44bb959c44f194f</Sha>
     </Dependency>
-    <Dependency Name="runtime.native.System.IO.Ports" Version="5.0.0-alpha.1.19563.6">
+    <Dependency Name="runtime.native.System.IO.Ports" Version="5.0.0-alpha.1.19563.3">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>5cee7c97d602f294e27c582d4dab81ec388f1d7b</Sha>
+      <Sha>cf64918877d98577363bb40d5eafac52beb80a79</Sha>
     </Dependency>
     <Dependency Name="Microsoft.NETCore.Runtime.CoreCLR" Version="5.0.0-alpha1.19563.3">
       <Uri>https://github.com/dotnet/coreclr</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index 0f806ee847c24d..4d884ab2a4b6a7 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -58,7 +58,7 @@
     <MicrosoftNETCoreTargetsVersion>5.0.0-alpha.1.19563.6</MicrosoftNETCoreTargetsVersion>
     <SystemTextJsonVersion>5.0.0-alpha.1.19563.6</SystemTextJsonVersion>
     <SystemTextEncodingsWebVersion>5.0.0-alpha.1.19563.6</SystemTextEncodingsWebVersion>
-    <runtimenativeSystemIOPortsVersion>5.0.0-alpha.1.19563.6</runtimenativeSystemIOPortsVersion>
+    <runtimenativeSystemIOPortsVersion>5.0.0-alpha.1.19563.3</runtimenativeSystemIOPortsVersion>
     <!-- Standard dependencies -->
     <NETStandardLibraryVersion>2.2.0-prerelease.19563.1</NETStandardLibraryVersion>
     <!-- dotnet-optimization dependencies -->