diff --git a/src/mono/nuget/Microsoft.NET.Sdk.WebAssembly.Pack/build/Microsoft.NET.Sdk.WebAssembly.Browser.targets b/src/mono/nuget/Microsoft.NET.Sdk.WebAssembly.Pack/build/Microsoft.NET.Sdk.WebAssembly.Browser.targets
index 74e652d5c9bef5..3a89fbcc2d9d15 100644
--- a/src/mono/nuget/Microsoft.NET.Sdk.WebAssembly.Pack/build/Microsoft.NET.Sdk.WebAssembly.Browser.targets
+++ b/src/mono/nuget/Microsoft.NET.Sdk.WebAssembly.Pack/build/Microsoft.NET.Sdk.WebAssembly.Browser.targets
@@ -203,6 +203,9 @@ Copyright (c) .NET Foundation. All rights reserved.
       <_WasmEnableWebcil>$(WasmEnableWebcil)</_WasmEnableWebcil>
       <_WasmEnableWebcil Condition="'$(_TargetingNET80OrLater)' != 'true'">false</_WasmEnableWebcil>
       <_WasmEnableWebcil Condition="'$(_WasmEnableWebcil)' == ''">true</_WasmEnableWebcil>
+      <_WasmWebcilVersion Condition="'$(_WasmWebcilVersion)' == ''">$(WasmWebcilVersion)</_WasmWebcilVersion>
+      <_WasmWebcilVersion Condition="'$(_WasmWebcilVersion)' == '' and '$(RuntimeFlavor)' == 'CoreCLR'">1</_WasmWebcilVersion>
+      <_WasmWebcilVersion Condition="'$(_WasmWebcilVersion)' == ''">0</_WasmWebcilVersion>
       <_BlazorWebAssemblyJiterpreter>$(BlazorWebAssemblyJiterpreter)</_BlazorWebAssemblyJiterpreter>
       <_BlazorWebAssemblyRuntimeOptions>$(BlazorWebAssemblyRuntimeOptions)</_BlazorWebAssemblyRuntimeOptions>
       <_WasmInlineBootConfig Condition="'$(_WasmInlineBootConfig)' == '' and '$(_TargetingNET100OrLater)' == 'true'">true</_WasmInlineBootConfig>
@@ -353,7 +356,7 @@ Copyright (c) .NET Foundation. All rights reserved.
       <_WasmBuildTmpWebcilPath>$([MSBuild]::NormalizeDirectory($(IntermediateOutputPath), 'tmp-webcil'))</_WasmBuildTmpWebcilPath>
     </PropertyGroup>
 
-    <ConvertDllsToWebcil Candidates="@(_BuildAssetsCandidates)" IntermediateOutputPath="$(_WasmBuildTmpWebcilPath)" OutputPath="$(_WasmBuildWebcilPath)" IsEnabled="$(_WasmEnableWebcil)">
+    <ConvertDllsToWebcil Candidates="@(_BuildAssetsCandidates)" IntermediateOutputPath="$(_WasmBuildTmpWebcilPath)" OutputPath="$(_WasmBuildWebcilPath)" IsEnabled="$(_WasmEnableWebcil)" WebcilVersion="$(_WasmWebcilVersion)">
       <Output TaskParameter="WebcilCandidates" ItemName="_WebcilAssetsCandidates" />
       <Output TaskParameter="PassThroughCandidates" ItemName="_WasmFrameworkCandidates" />
       <Output TaskParameter="FileWrites" ItemName="FileWrites" />
@@ -791,7 +794,7 @@ Copyright (c) .NET Foundation. All rights reserved.
       <_WasmPublishTmpWebcilPath>$([MSBuild]::NormalizeDirectory($(IntermediateOutputPath), 'tmp-webcil', 'publish'))</_WasmPublishTmpWebcilPath>
     </PropertyGroup>
 
-    <ConvertDllsToWebcil Candidates="@(_NewWasmPublishStaticWebAssets)" IntermediateOutputPath="$(_WasmPublishTmpWebcilPath)" OutputPath="$(_WasmPublishWebcilPath)" IsEnabled="$(_WasmEnableWebcil)">
+    <ConvertDllsToWebcil Candidates="@(_NewWasmPublishStaticWebAssets)" IntermediateOutputPath="$(_WasmPublishTmpWebcilPath)" OutputPath="$(_WasmPublishWebcilPath)" IsEnabled="$(_WasmEnableWebcil)" WebcilVersion="$(_WasmWebcilVersion)">
       <Output TaskParameter="WebcilCandidates" ItemName="_NewWebcilPublishStaticWebAssetsCandidates" />
       <Output TaskParameter="FileWrites" ItemName="FileWrites" />
     </ConvertDllsToWebcil>
diff --git a/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ConvertDllsToWebCil.cs b/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ConvertDllsToWebCil.cs
index b214fb74573fe4..582bd7d3098093 100644
--- a/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ConvertDllsToWebCil.cs
+++ b/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ConvertDllsToWebCil.cs
@@ -23,6 +23,8 @@ public class ConvertDllsToWebcil : Task
     [Required]
     public bool IsEnabled { get; set; }
 
+    public int WebcilVersion { get; set; }
+
     [Output]
     public ITaskItem[] WebcilCandidates { get; set; }
 
@@ -133,7 +135,7 @@ private TaskItem ConvertDll(string tmpDir, ITaskItem candidate)
         {
             var tmpWebcil = Path.Combine(tmpDir, webcilFileName);
             var logAdapter = new Microsoft.WebAssembly.Build.Tasks.LogAdapter(Log);
-            var webcilWriter = Microsoft.WebAssembly.Build.Tasks.WebcilConverter.FromPortableExecutable(inputPath: dllFilePath, outputPath: tmpWebcil, logger: logAdapter);
+            var webcilWriter = Microsoft.WebAssembly.Build.Tasks.WebcilConverter.FromPortableExecutable(inputPath: dllFilePath, outputPath: tmpWebcil, logger: logAdapter, webcilVersion: WebcilVersion);
             webcilWriter.ConvertToWebcil();
 
             if (!Directory.Exists(candidatePath))