diff --git a/Directory.Packages.props b/Directory.Packages.props
index c9ddcf1..b3de04e 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -14,7 +14,7 @@
     <PackageVersion Include="MinVer" Version="7.0.0" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
     <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.556" />
-    <PackageVersion Include="TIKSN-Framework" Version="5.7.0" />
+    <PackageVersion Include="TIKSN-Framework" Version="5.7.1" />
     <PackageVersion Include="xunit" Version="2.9.3" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
   </ItemGroup>
diff --git a/Source/Licensing/SystemEntitlementsConverter.cs b/Source/Licensing/SystemEntitlementsConverter.cs
index 04d84c6..f370c68 100644
--- a/Source/Licensing/SystemEntitlementsConverter.cs
+++ b/Source/Licensing/SystemEntitlementsConverter.cs
@@ -79,7 +79,7 @@ public Validation<Error, SystemLicenseEntitlements> Convert(
 
             result.CountryCodes.AddRange(
                 entitlements.Countries
-                    .Select(x => x.TwoLetterISORegionName));
+                    .Select(x => x.PrincipalRegion.TwoLetterISORegionName));
         }
 
         if (errors.Count > 0)
@@ -180,7 +180,7 @@ private Option<CountryInfo> CreateCountry(string? name, Action<Error> addError)
     }
 
     private void ValidateCountryCode(CountryInfo? country, Action<Error> addError)
-        => this.ValidateCountryCode(country?.TwoLetterISORegionName, addError);
+        => this.ValidateCountryCode(country?.PrincipalRegion.TwoLetterISORegionName, addError);
 
     private void ValidateCountryCode(string? code, Action<Error> addError)
     {
diff --git a/Tests/Licensing.Test/SystemEntitlementsConverterTests.cs b/Tests/Licensing.Test/SystemEntitlementsConverterTests.cs
index 2c2e9e9..d943548 100644
--- a/Tests/Licensing.Test/SystemEntitlementsConverterTests.cs
+++ b/Tests/Licensing.Test/SystemEntitlementsConverterTests.cs
@@ -81,7 +81,7 @@ public void GivenCountryCode_WhenSystemEntitlementsConverted_Then(string country
         _ = validation.IfSuccess(x =>
         {
             _ = Assert.Single(x.CountryCodes);
-            Assert.Equal(country.TwoLetterISORegionName, x.CountryCodes.Single());
+            Assert.Equal(country.PrincipalRegion.TwoLetterISORegionName, x.CountryCodes.Single());
         });
     }