diff --git a/Directory.Build.props b/Directory.Build.props
index b61b4628104..7650326c62c 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -47,7 +47,7 @@
     <NuGetApiPackageVersion>5.4.0</NuGetApiPackageVersion>
     <LZ4PackageVersion>1.1.11</LZ4PackageVersion>
     <MonoOptionsVersion>6.12.0.148</MonoOptionsVersion>
-    <SystemCollectionsImmutableVersion>7.0.0</SystemCollectionsImmutableVersion>
+    <SystemCollectionsImmutableVersion>6.0.0</SystemCollectionsImmutableVersion>
     <SystemRuntimeCompilerServicesUnsafeVersion>6.0.0</SystemRuntimeCompilerServicesUnsafeVersion>
     <ELFSharpVersion>2.13.1</ELFSharpVersion>
     <MdocPackageVersion Condition=" '$(MdocPackageVersion)' == '' ">5.8.9.2</MdocPackageVersion>
diff --git a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/App.config b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/App.config
index 04eeba2659a..18110d074d9 100644
--- a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/App.config
+++ b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/App.config
@@ -10,13 +10,13 @@
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-99.9.9.9" newVersion="5.0.0.0" />
+        <bindingRedirect oldVersion="0.0.0.0-99.9.9.9" newVersion="6.0.0.0" />
       </dependentAssembly>
     </assemblyBinding>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-99.9.9.9" newVersion="5.0.0.0" />
+        <bindingRedirect oldVersion="0.0.0.0-99.9.9.9" newVersion="6.0.0.0" />
       </dependentAssembly>
     </assemblyBinding>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
diff --git a/tools/xabuild/App.config b/tools/xabuild/App.config
index 95e45f7d20b..df79e5196a3 100644
--- a/tools/xabuild/App.config
+++ b/tools/xabuild/App.config
@@ -39,7 +39,7 @@
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-99.9.9.9" newVersion="7.0.0.0" />
+        <bindingRedirect oldVersion="0.0.0.0-99.9.9.9" newVersion="6.0.0.0" />
       </dependentAssembly>
     </assemblyBinding>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">