diff --git a/src/Api/KeyManagement/Models/Response/PublicKeyEncryptionKeyPairResponseModel.cs b/src/Api/KeyManagement/Models/Response/PublicKeyEncryptionKeyPairResponseModel.cs
index db25e498aa..8d62dbcdc1 100644
--- a/src/Api/KeyManagement/Models/Response/PublicKeyEncryptionKeyPairResponseModel.cs
+++ b/src/Api/KeyManagement/Models/Response/PublicKeyEncryptionKeyPairResponseModel.cs
@@ -1,14 +1,32 @@
-using Bit.Core.KeyManagement.Models.Data;
+using System.Text.Json.Serialization;
+using Bit.Core.KeyManagement.Models.Data;
 using Bit.Core.Models.Api;
 
 namespace Bit.Api.KeyManagement.Models.Response;
 
-[method: System.Diagnostics.CodeAnalysis.SetsRequiredMembersAttribute]
 #nullable enable
 
-public class PublicKeyEncryptionKeyPairModel(PublicKeyEncryptionKeyPairData keyPair) : ResponseModel("publicKeyEncryptionKeyPair")
+public class PublicKeyEncryptionKeyPairModel : ResponseModel
 {
-    public required string WrappedPrivateKey { get; set; } = keyPair.WrappedPrivateKey;
-    public required string PublicKey { get; set; } = keyPair.PublicKey;
-    public string? SignedPublicKey { get; set; } = keyPair.SignedPublicKey;
+    public required string WrappedPrivateKey { get; set; }
+    public required string PublicKey { get; set; }
+    public string? SignedPublicKey { get; set; }
+
+    [System.Diagnostics.CodeAnalysis.SetsRequiredMembersAttribute]
+    public PublicKeyEncryptionKeyPairModel(PublicKeyEncryptionKeyPairData keyPair)
+        : base("publicKeyEncryptionKeyPair")
+    {
+        WrappedPrivateKey = keyPair.WrappedPrivateKey;
+        PublicKey = keyPair.PublicKey;
+        SignedPublicKey = keyPair.SignedPublicKey;
+    }
+
+    [JsonConstructor]
+    public PublicKeyEncryptionKeyPairModel(string wrappedPrivateKey, string publicKey, string? signedPublicKey)
+        : base("publicKeyEncryptionKeyPair")
+    {
+        WrappedPrivateKey = wrappedPrivateKey ?? throw new ArgumentNullException(nameof(wrappedPrivateKey));
+        PublicKey = publicKey ?? throw new ArgumentNullException(nameof(publicKey));
+        SignedPublicKey = signedPublicKey;
+    }
 }
diff --git a/src/Api/KeyManagement/Models/Response/SignatureKeyPairResponseModel.cs b/src/Api/KeyManagement/Models/Response/SignatureKeyPairResponseModel.cs
index 59b5ca20c2..76fb8aad10 100644
--- a/src/Api/KeyManagement/Models/Response/SignatureKeyPairResponseModel.cs
+++ b/src/Api/KeyManagement/Models/Response/SignatureKeyPairResponseModel.cs
@@ -1,13 +1,35 @@
-using Bit.Core.KeyManagement.Models.Data;
+using System.Text.Json.Serialization;
+using Bit.Core.KeyManagement.Models.Data;
 using Bit.Core.Models.Api;
 
 namespace Bit.Api.KeyManagement.Models.Response;
 
-[method: System.Diagnostics.CodeAnalysis.SetsRequiredMembersAttribute]
 #nullable enable
 
-public class SignatureKeyPairResponseModel(SignatureKeyPairData signatureKeyPair) : ResponseModel("signatureKeyPair")
+public class SignatureKeyPairResponseModel : ResponseModel
 {
-    public required string WrappedSigningKey { get; set; } = signatureKeyPair.WrappedSigningKey;
-    public required string VerifyingKey { get; set; } = signatureKeyPair.VerifyingKey;
+    public required string WrappedSigningKey;
+    public required string VerifyingKey;
+
+    [System.Diagnostics.CodeAnalysis.SetsRequiredMembersAttribute]
+    public SignatureKeyPairResponseModel(SignatureKeyPairData signatureKeyPair)
+        : base("signatureKeyPair")
+    {
+        if (signatureKeyPair == null)
+        {
+            throw new ArgumentNullException(nameof(signatureKeyPair));
+        }
+
+        WrappedSigningKey = signatureKeyPair.WrappedSigningKey;
+        VerifyingKey = signatureKeyPair.VerifyingKey;
+    }
+
+
+    [JsonConstructor]
+    public SignatureKeyPairResponseModel(string wrappedSigningKey, string verifyingKey)
+        : base("signatureKeyPair")
+    {
+        WrappedSigningKey = wrappedSigningKey ?? throw new ArgumentNullException(nameof(wrappedSigningKey));
+        VerifyingKey = verifyingKey ?? throw new ArgumentNullException(nameof(verifyingKey));
+    }
 }