diff --git a/build/dependencies.props b/build/dependencies.props
index d2cb0c14a9..c315af87ae 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -37,6 +37,7 @@
     <SystemIOPipelinesPackageVersion>4.5.0-preview2-26313-01</SystemIOPipelinesPackageVersion>
     <SystemManagementAutomationPackageVersion>6.1.7601.17515</SystemManagementAutomationPackageVersion>
     <SystemMemoryPackageVersion>4.5.0-preview2-26313-01</SystemMemoryPackageVersion>
+    <SystemNetWebSocketsWebSocketProtocolPackageVersion>4.5.0-preview2-26313-01</SystemNetWebSocketsWebSocketProtocolPackageVersion>
     <SystemNumericsVectorsPackageVersion>4.5.0-preview2-26313-01</SystemNumericsVectorsPackageVersion>
     <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-preview2-26313-01</SystemRuntimeCompilerServicesUnsafePackageVersion>
     <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-preview2-26313-01</SystemSecurityPrincipalWindowsPackageVersion>