diff --git a/src/ACMEv2/Core/Extensions/JsonExtensions.cs b/src/ACMEv2/Core/Extensions/JsonExtensions.cs
new file mode 100644
index 0000000..d037e10
--- /dev/null
+++ b/src/ACMEv2/Core/Extensions/JsonExtensions.cs
@@ -0,0 +1,27 @@
+using System.Text.Json;
+
+namespace CronBlocks.ACMEv2.Core.Extensions
+{
+    internal static class JsonExtensions
+    {
+        public static string SerializeToJson<T>(this T obj)
+        {
+            if (obj == null)
+            {
+                return null;
+            }
+
+            return JsonSerializer.Serialize(obj);
+        }
+
+        public static T DeserializeFromJson<T>(this string json)
+        {
+            if (string.IsNullOrEmpty(json))
+            {
+                return default(T);
+            }
+
+            return JsonSerializer.Deserialize<T>(json);
+        }
+    }
+}