diff --git a/AwsEncryptionSDK/runtimes/net/ESDK.csproj b/AwsEncryptionSDK/runtimes/net/ESDK.csproj
index d0332e517..5d375c521 100644
--- a/AwsEncryptionSDK/runtimes/net/ESDK.csproj
+++ b/AwsEncryptionSDK/runtimes/net/ESDK.csproj
@@ -33,7 +33,7 @@
       <PackageReference Include="AWSSDK.Core" Version="3.7.300.2" />
       <PackageReference Include="DafnyRuntime" Version="4.2.0" />
       <PackageReference Include="BouncyCastle.Cryptography" Version="2.2.1" />
-      <PackageReference Include="AWS.Cryptography.MaterialProviders" Version="1.3.0" />
+      <ProjectReference Include="../../../mpl/AwsCryptographicMaterialProviders/runtimes/net/MPL.csproj" />
       <!--
         System.Collections.Immutable can be removed once dafny.msbuild is updated with
         https://github.com/dafny-lang/dafny.msbuild/pull/10 and versioned