diff --git a/.github/workflows/dotnet.yml b/.github/workflows/dotnet.yml
index 4578a43..6624da4 100644
--- a/.github/workflows/dotnet.yml
+++ b/.github/workflows/dotnet.yml
@@ -196,3 +196,4 @@ jobs:
       with:
         name: integration-test-artifacts
         path: ${{ github.workspace }}/mock-data-recipient/Source/DockerCompose/_temp/mock-register/tmp
+
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e3ba295..e597c4d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+## [3.0.2] - 2025-08-06
+### Fixed
+- Fixed issue where some claims in the PAR request were not sent in lowercase.
+
 ## [3.0.1] - 2025-06-19
 ### Changed
 - Fixed multiple build warnings to improve code quality and maintainability
diff --git a/Source/CDR.DataRecipient.SDK/Models/Acr.cs b/Source/CDR.DataRecipient.SDK/Models/Acr.cs
index 819e46a..2e65796 100644
--- a/Source/CDR.DataRecipient.SDK/Models/Acr.cs
+++ b/Source/CDR.DataRecipient.SDK/Models/Acr.cs
@@ -1,13 +1,13 @@
-using Newtonsoft.Json;
+using System.Text.Json.Serialization;
 
 namespace CDR.DataRecipient.SDK.Models.AuthorisationRequest
 {
     public class Acr
     {
-        [JsonProperty(PropertyName = "essential")]
+        [JsonPropertyName("essential")]
         public bool Essential { get; set; }
 
-        [JsonProperty(PropertyName = "values")]
+        [JsonPropertyName("values")]
         public string[] Values { get; set; }
     }
 }
diff --git a/Source/CDR.DataRecipient.SDK/Models/AuthorisationRequestClaims.cs b/Source/CDR.DataRecipient.SDK/Models/AuthorisationRequestClaims.cs
index 5e7e5bf..97fd30b 100644
--- a/Source/CDR.DataRecipient.SDK/Models/AuthorisationRequestClaims.cs
+++ b/Source/CDR.DataRecipient.SDK/Models/AuthorisationRequestClaims.cs
@@ -1,4 +1,4 @@
-using Newtonsoft.Json;
+using System.Text.Json.Serialization;
 
 namespace CDR.DataRecipient.SDK.Models.AuthorisationRequest
 {
@@ -10,16 +10,16 @@ public AuthorisationRequestClaims(int supportedAcr)
             this.Id_token = new IdToken(supportedAcr);
         }
 
-        [JsonProperty("sharing_duration")]
+        [JsonPropertyName("sharing_duration")]
         public int? Sharing_duration { get; set; }
 
-        [JsonProperty("cdr_arrangement_id")]
+        [JsonPropertyName("cdr_arrangement_id")]
         public string Cdr_arrangement_id { get; set; }
 
-        [JsonProperty("userinfo")]
+        [JsonPropertyName("userinfo")]
         public AuthorisationRequestClaimsUserInfo Userinfo { get; set; }
 
-        [JsonProperty("id_token")]
+        [JsonPropertyName("id_token")]
         public IdToken Id_token { get; set; }
     }
 }
diff --git a/Source/CDR.DataRecipient.SDK/Models/AuthorisationRequestClaimsUserInfo.cs b/Source/CDR.DataRecipient.SDK/Models/AuthorisationRequestClaimsUserInfo.cs
index 8b9979d..d95356d 100644
--- a/Source/CDR.DataRecipient.SDK/Models/AuthorisationRequestClaimsUserInfo.cs
+++ b/Source/CDR.DataRecipient.SDK/Models/AuthorisationRequestClaimsUserInfo.cs
@@ -1,13 +1,13 @@
-using Newtonsoft.Json;
+using System.Text.Json.Serialization;
 
 namespace CDR.DataRecipient.SDK.Models.AuthorisationRequest
 {
     public class AuthorisationRequestClaimsUserInfo
     {
-        [JsonProperty("given_name")]
+        [JsonPropertyName("given_name")]
         public string Given_name { get; set; }
 
-        [JsonProperty("family_name")]
+        [JsonPropertyName("family_name")]
         public string Family_name { get; set; }
     }
 }
diff --git a/Source/CDR.DataRecipient.SDK/Models/IdToken.cs b/Source/CDR.DataRecipient.SDK/Models/IdToken.cs
index 963b611..32fd57d 100644
--- a/Source/CDR.DataRecipient.SDK/Models/IdToken.cs
+++ b/Source/CDR.DataRecipient.SDK/Models/IdToken.cs
@@ -1,4 +1,4 @@
-using Newtonsoft.Json;
+using System.Text.Json.Serialization;
 
 namespace CDR.DataRecipient.SDK.Models.AuthorisationRequest
 {
@@ -9,7 +9,7 @@ public IdToken(int supportedAcr)
             this.Acr = new Acr() { Essential = true, Values = new string[] { $"urn:cds.au:cdr:{supportedAcr}" } };
         }
 
-        [JsonProperty("acr")]
+        [JsonPropertyName("acr")]
         public Acr Acr { get; set; }
     }
 }
diff --git a/Source/Directory.Build.props b/Source/Directory.Build.props
index dcff766..9a0d1e6 100644
--- a/Source/Directory.Build.props
+++ b/Source/Directory.Build.props
@@ -1,7 +1,7 @@
 <Project>
     <PropertyGroup>
         <TargetFrameworkVersion>net8.0</TargetFrameworkVersion>
-		<Version>3.0.1</Version>
+		<Version>3.0.2</Version>
 		<RunAnalyzersDuringBuild>true</RunAnalyzersDuringBuild>
 		<EnableNETAnalyzers>true</EnableNETAnalyzers>
 		<TreatWarningsAsErrors Condition="'$(Configuration)' == 'Release'">true</TreatWarningsAsErrors>