diff --git a/AwsEncryptionSDK/runtimes/net/CHANGELOG.md b/AwsEncryptionSDK/runtimes/net/CHANGELOG.md
index 3a51ab1a7..2fa7f7f94 100644
--- a/AwsEncryptionSDK/runtimes/net/CHANGELOG.md
+++ b/AwsEncryptionSDK/runtimes/net/CHANGELOG.md
@@ -1,5 +1,32 @@
 # Changelog
 
+## [5.0.0](https://github.com/aws/aws-encryption-sdk-dafny/compare/v4.1.0...v5.0.0) (2026-03-23)
+
+### ⚠ BREAKING CHANGES
+
+- This version now explicitly depends on AWS SDK V4, if you need to use AWS SDK V3 you MUST use a previous version of this library.
+
+### Features
+
+- Bump to MPL V2 ([#869](https://github.com/aws/aws-encryption-sdk-dafny/issues/869)) ([9ddae5c](https://github.com/aws/aws-encryption-sdk-dafny/commit/9ddae5cdf6a6668cbaf43e551958100533d46fae))
+
+### Fixes
+
+- **.NET:** Improve Collection of Errors string ([#728](https://github.com/aws/aws-encryption-sdk-dafny/issues/728)) ([d66248b](https://github.com/aws/aws-encryption-sdk-dafny/commit/d66248b956e5bce553fd64ba46189a5ac6eb69ee))
+
+### Maintenance
+
+- add C to list of languages checked for interoperability ([#773](https://github.com/aws/aws-encryption-sdk-dafny/issues/773)) ([3b9297a](https://github.com/aws/aws-encryption-sdk-dafny/commit/3b9297aa54dc984885e426236987d55197cffc9f))
+- **TestVectors:** add DefaultCmm Tests ([#698](https://github.com/aws/aws-encryption-sdk-dafny/issues/698)) ([a287d45](https://github.com/aws/aws-encryption-sdk-dafny/commit/a287d45c25688dfc07b3b94587bc1f0f152b810e))
+
+## 4.1.1
+
+### Notes
+
+- Update .csproj files to prevent use of AWS-SDK-NET V4
+
+**Full Changelog**: <https://github.com/aws/aws-encryption-sdk/compare/v4.1.0...v4.1.1>
+
 ## 4.1.0
 
 ### Notes
diff --git a/AwsEncryptionSDK/runtimes/net/ESDK.csproj b/AwsEncryptionSDK/runtimes/net/ESDK.csproj
index 2dcdef83b..cc340e71a 100644
--- a/AwsEncryptionSDK/runtimes/net/ESDK.csproj
+++ b/AwsEncryptionSDK/runtimes/net/ESDK.csproj
@@ -8,7 +8,7 @@
       <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
       <IsPackable>true</IsPackable>
       
-      <Version>4.1.0</Version>
+      <Version>5.0.0</Version>
 
       <AssemblyName>AWS.Cryptography.EncryptionSDK</AssemblyName>
       <PackageId>AWS.Cryptography.EncryptionSDK</PackageId>
@@ -30,8 +30,7 @@
 
   <ItemGroup>
       <!-- TODO: manually upgraded to match the latest from MPL, is that reasonable? -->
-      <PackageReference Include="DafnyRuntime" Version="4.9.0" />
-      <PackageReference Include="BouncyCastle.Cryptography" Version="2.6.2" />
+      <PackageReference Include="DafnyRuntime" Version="[4.9.0]" />
       <ProjectReference Include="../../../mpl/AwsCryptographicMaterialProviders/runtimes/net/MPL.csproj" />
       <!--
         System.Collections.Immutable can be removed once dafny.msbuild is updated with