diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index f72a2cc159..8fe01b3cb0 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -9,9 +9,9 @@
 -->
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.AspNetCore.Blazor.Mono" Version="3.0.0-preview9.19573.1">
+    <Dependency Name="Microsoft.AspNetCore.Blazor.Mono" Version="3.0.0-preview9.19577.2">
       <Uri>https://github.com/aspnet/Blazor</Uri>
-      <Sha>c4b0f964333255edca0856fc937735fef34b2d02</Sha>
+      <Sha>23338158154b064321d9d5c418d0fb71264d7bf9</Sha>
     </Dependency>
     <Dependency Name="Microsoft.AspNetCore.Razor.Language" Version="3.0.2-servicing.19572.1">
       <Uri>https://github.com/aspnet/AspNetCore-Tooling</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index aa9a8cb4e9..b320bf695f 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -100,7 +100,7 @@
     <!-- Only listed explicitly to workaround https://github.com/dotnet/cli/issues/10528 -->
     <MicrosoftNETCorePlatformsPackageVersion>3.0.0</MicrosoftNETCorePlatformsPackageVersion>
     <!-- Packages from aspnet/Blazor -->
-    <MicrosoftAspNetCoreBlazorMonoPackageVersion>3.0.0-preview9.19573.1</MicrosoftAspNetCoreBlazorMonoPackageVersion>
+    <MicrosoftAspNetCoreBlazorMonoPackageVersion>3.0.0-preview9.19577.2</MicrosoftAspNetCoreBlazorMonoPackageVersion>
     <!-- Packages from aspnet/Extensions -->
     <InternalAspNetCoreAnalyzersPackageVersion>3.0.2-servicing.19575.2</InternalAspNetCoreAnalyzersPackageVersion>
     <MicrosoftAspNetCoreAnalyzerTestingPackageVersion>3.0.2-servicing.19575.2</MicrosoftAspNetCoreAnalyzerTestingPackageVersion>