diff --git a/ModpackUpdater/IActionSet.cs b/ModpackUpdater/IActionSet.cs
new file mode 100644
index 0000000..19af91a
--- /dev/null
+++ b/ModpackUpdater/IActionSet.cs
@@ -0,0 +1,6 @@
+namespace ModpackUpdater;
+
+public interface IActionSet
+{
+    IEnumerable<InstallAction> Actions { get; }
+}
diff --git a/ModpackUpdater/IActionSetInfos.cs b/ModpackUpdater/IActionSetInfos.cs
index 3293ed7..3d96f17 100644
--- a/ModpackUpdater/IActionSetInfos.cs
+++ b/ModpackUpdater/IActionSetInfos.cs
@@ -1,10 +1,7 @@
 namespace ModpackUpdater;
 
-public interface IActionSetInfos
+public interface IActionSetInfos : IActionSet
 {
     Version Version { get; set; }
-
-    public bool IsPublic { get; set; }
-
-    IEnumerable<InstallAction> Actions { get; }
+    bool IsPublic { get; set; }
 }
diff --git a/ModpackUpdater/InstallAction.cs b/ModpackUpdater/InstallAction.cs
index eaef33d..bca679e 100644
--- a/ModpackUpdater/InstallAction.cs
+++ b/ModpackUpdater/InstallAction.cs
@@ -50,6 +50,9 @@ public class InstallAction
     [DefaultValue(false)]
     public bool IsExtra { get; set; }
 
+    [DefaultValue(null)]
+    public string TargetOption { get; set; }
+
     [JsonProperty, Obsolete]
     private string DownloadUrl
     {
diff --git a/ModpackUpdater/InstallInfos.cs b/ModpackUpdater/InstallInfos.cs
index 5280e7d..207ba4f 100644
--- a/ModpackUpdater/InstallInfos.cs
+++ b/ModpackUpdater/InstallInfos.cs
@@ -15,7 +15,7 @@ public class InstallInfos : IActionSetInfos
 
     public List<InstallOptionSet> OptionSets { get; } = [];
 
-    IEnumerable<InstallAction> IActionSetInfos.Actions => Actions;
+    IEnumerable<InstallAction> IActionSet.Actions => Actions;
 
     public static InstallInfos Parse(string content)
     {
diff --git a/ModpackUpdater/InstallOption.cs b/ModpackUpdater/InstallOption.cs
index b8578ac..380fae4 100644
--- a/ModpackUpdater/InstallOption.cs
+++ b/ModpackUpdater/InstallOption.cs
@@ -1,8 +1,21 @@
-namespace ModpackUpdater;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using System.ComponentModel;
 
-public class InstallOption
+namespace ModpackUpdater;
+
+public class InstallOption : IActionSet
 {
     public string Id { get; set; }
-    public List<InstallAction> InstallActions { get; } = [];
+
+    [DefaultValue(null)]
+    public string Description { get; set; }
+    
+    [DefaultValue(Side.Both)]
+    [JsonConverter(typeof(StringEnumConverter))]
+    public Side Side { get; set; } = Side.Both;
+
     public List<UpdateAction> UninstallActions { get; } = [];
+
+    IEnumerable<InstallAction> IActionSet.Actions => UninstallActions.Cast<InstallAction>();
 }
diff --git a/ModpackUpdater/InstallOptionSet.cs b/ModpackUpdater/InstallOptionSet.cs
index 407d064..9b21af8 100644
--- a/ModpackUpdater/InstallOptionSet.cs
+++ b/ModpackUpdater/InstallOptionSet.cs
@@ -1,9 +1,24 @@
-namespace ModpackUpdater;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using System.ComponentModel;
+
+namespace ModpackUpdater;
 
 public class InstallOptionSet
 {
     public string Id { get; set; }
+
+    [DefaultValue(null)]
+    public string Description { get; set; }
+
+    [DefaultValue(Side.Both)]
+    [JsonConverter(typeof(StringEnumConverter))]
+    public Side Side { get; set; } = Side.Both;
+
+    [DefaultValue(false)]
     public bool Multiselect { get; set; }
-    public string DefaultValue { get; set; }
+
+    public List<int> Defaults { get; } = [];
+
     public List<InstallOption> Options { get; } = [];
 }
diff --git a/ModpackUpdater/UpdateInfo.cs b/ModpackUpdater/UpdateInfo.cs
index 30ece9c..eb31ed3 100644
--- a/ModpackUpdater/UpdateInfo.cs
+++ b/ModpackUpdater/UpdateInfo.cs
@@ -13,5 +13,5 @@ public class UpdateInfo : IActionSetInfos
 
     public List<UpdateAction> Actions { get; } = [];
 
-    IEnumerable<InstallAction> IActionSetInfos.Actions => Actions.Cast<InstallAction>();
+    IEnumerable<InstallAction> IActionSet.Actions => Actions.Cast<InstallAction>();
 }
\ No newline at end of file