diff --git a/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props b/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props
index 908cb7a9000..bdd8ebf8558 100644
--- a/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props
+++ b/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props
@@ -37,7 +37,7 @@
     -->
     <FileExtensionSignInfo Include=".jar" CertificateName="MicrosoftJARSHA2" />
     <FileExtensionSignInfo Include=".js;.ps1;.psd1;.psm1;.psc1;.py" CertificateName="Microsoft400" />
-    <FileExtensionSignInfo Include=".dll;.exe" CertificateName="Microsoft400" />
+    <FileExtensionSignInfo Include=".dll;.exe;.mibc" CertificateName="Microsoft400" />
     <FileExtensionSignInfo Include=".nupkg" CertificateName="NuGet" />
     <FileExtensionSignInfo Include=".vsix" CertificateName="VsixSHA2" />
     <FileExtensionSignInfo Include=".zip" CertificateName="None" />