diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index a3b61734d48..5d099d46ea5 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.25170.3">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.25204.3">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>6968f7059f4418e985febe704a3b1320f9e5887d</Sha>
+      <Sha>643689c88b1d5a0f1561383972c4189a0c673abe</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
diff --git a/eng/Versions.props b/eng/Versions.props
index 5ce287e802b..3b796e557b9 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -74,8 +74,8 @@
   <!-- Dependencies from maintenance-packages, source-build specific -->
   <PropertyGroup Condition="'$(DotNetBuildSourceOnly)' == 'true'">
     <SystemBuffersVersion>4.6.1</SystemBuffersVersion>
-    <SystemMemoryVersion>4.6.2</SystemMemoryVersion>
-    <SystemRuntimeCompilerServicesUnsafeVersion>6.1.1</SystemRuntimeCompilerServicesUnsafeVersion>
+    <SystemMemoryVersion>4.6.3</SystemMemoryVersion>
+    <SystemRuntimeCompilerServicesUnsafeVersion>6.1.2</SystemRuntimeCompilerServicesUnsafeVersion>
   </PropertyGroup>
   <!-- Dependencies from maintenance-packages, everything else -->
   <PropertyGroup Condition="'$(DotNetBuildSourceOnly)' != 'true'">