diff --git a/src/Tasks/Microsoft.NET.Build.Tasks/PreprocessPackageDependenciesDesignTime.cs b/src/Tasks/Microsoft.NET.Build.Tasks/PreprocessPackageDependenciesDesignTime.cs
index 2737cd2bc1e3..ff096e631b93 100644
--- a/src/Tasks/Microsoft.NET.Build.Tasks/PreprocessPackageDependenciesDesignTime.cs
+++ b/src/Tasks/Microsoft.NET.Build.Tasks/PreprocessPackageDependenciesDesignTime.cs
@@ -284,7 +284,7 @@ public ItemMetadata(DependencyType type)
             /// A list of name/version strings to specify dependency identities.
             /// Note: identity here is just a "name/version" and does not have TFM part in front.
             /// </summary>
-            public IList<string> Dependencies { get; }
+            public List<string> Dependencies { get; }
 
             /// <summary>
             /// Returns name/value pairs for metadata specific to given item type's implementation.