diff --git a/DigitalData.Auth.Client/ClientParams.cs b/DigitalData.Auth.Client/ClientParams.cs
index 6c9db25..d97b73f 100644
--- a/DigitalData.Auth.Client/ClientParams.cs
+++ b/DigitalData.Auth.Client/ClientParams.cs
@@ -42,5 +42,5 @@ public class ClientParams
         });
     }
 
-    public IEnumerable<AsymmetricPublicKey> PublicKeys { get; init; } = new List<AsymmetricPublicKey>();
+    public List<AsymmetricPublicKey> PublicKeys { get; init; } = new();
 }
\ No newline at end of file
diff --git a/DigitalData.Auth.Tests/Client/AuthClientTests.cs b/DigitalData.Auth.Tests/Client/AuthClientTests.cs
index d949b56..6cd2e8e 100644
--- a/DigitalData.Auth.Tests/Client/AuthClientTests.cs
+++ b/DigitalData.Auth.Tests/Client/AuthClientTests.cs
@@ -185,4 +185,28 @@ public class AuthClientTests
             Assert.That(publicKey, Is.EqualTo(expectedPublicKey));
         });
     }
+
+    [Test]
+    public async Task StartAsync_ShouldUpdateAllPublicKey()
+    {
+        // Arrange
+        var publicKey = new AsymmetricPublicKey() { Issuer = "Foo", Audience = "Bar" };
+        var provider = Build(opt =>
+        {
+            opt.Url = _hubUrl;
+            opt.PublicKeys.Add(new AsymmetricPublicKey() { Issuer = "Foo", Audience = "Bar" });
+        });
+        var client = provider.GetRequiredService<IAuthClient>();
+        await client.StartAsync();
+
+        // wait for network
+        await Task.Delay(2000);
+
+        // Act
+        var expectedPublicKey = _tokenDescriptors.Get("Foo", "Bar").PublicKey;
+        await client.GetPublicKeyAsync("Foo", "Bar");
+
+        // Assert
+        Assert.That(publicKey.Content, Is.EqualTo(expectedPublicKey.Content));
+    }
 }
\ No newline at end of file