diff --git a/src/StructLinq/StructLinq.csproj b/src/StructLinq/StructLinq.csproj
index 89cfc62..316d61a 100644
--- a/src/StructLinq/StructLinq.csproj
+++ b/src/StructLinq/StructLinq.csproj
@@ -22,8 +22,8 @@
     </PackageReference>
     <PackageReference Include="System.Buffers" Version="4.5.1" />
     
-	<PackageReference Condition="!'$(OldVersion)'" Include="System.Collections.Immutable" Version="7.0.0" />
-	<PackageReference Condition="'$(OldVersion)'" Include="System.Collections.Immutable" Version="5.0.0" />
+	<PackageReference Condition="!'$(OldVersion)'" Include="System.Collections.Immutable" Version="8.0.0" />
+	<PackageReference Condition="'$(OldVersion)'" Include="System.Collections.Immutable" Version="8.0.0" />
 	<PackageReference Include="System.ValueTuple" Version="4.5.0" />
   </ItemGroup>