diff --git a/eng/Versions.props b/eng/Versions.props
index 82fe464071..e40a722c1e 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -25,7 +25,7 @@
     <!-- <UsingToolMicrosoftNetCompilers Condition="'$(DotNetBuildSourceOnly)' != 'true'">true</UsingToolMicrosoftNetCompilers> -->
     <!-- CoreFX -->
     <SystemReflectionMetadataVersion>8.0.0</SystemReflectionMetadataVersion>
-    <SystemCollectionsImmutableVersion>8.0.0</SystemCollectionsImmutableVersion>
+    <SystemCollectionsImmutableVersion>9.0.11</SystemCollectionsImmutableVersion>
     <!-- Other libs -->
     <MicrosoftBclAsyncInterfacesVersion>9.0.8</MicrosoftBclAsyncInterfacesVersion>
     <MicrosoftDiaSymReaderNativeVersion>17.10.0-beta1.24272.1</MicrosoftDiaSymReaderNativeVersion>