diff --git a/Il2CppInspector.CLI/PluginOptions.cs b/Il2CppInspector.CLI/PluginOptions.cs
index 177f0a3..27901a2 100644
--- a/Il2CppInspector.CLI/PluginOptions.cs
+++ b/Il2CppInspector.CLI/PluginOptions.cs
@@ -181,10 +181,9 @@ namespace Il2CppInspector.CLI
                     }
                 }
 
-                // Enable plugin
+                // Enable plugin and inform of options
                 PluginManager.AsInstance.ManagedPlugins.First(p => p.Plugin == plugin).Enabled = true;
-
-                // TODO: Plugin hook OptionsChanged
+                PluginManager.OptionsChanged(plugin);
             }
             return true;
         }
diff --git a/Il2CppInspector.Common/Plugins/API/V100/Hooks.cs b/Il2CppInspector.Common/Plugins/API/V100/Hooks.cs
index da21d0f..d0765de 100644
--- a/Il2CppInspector.Common/Plugins/API/V100/Hooks.cs
+++ b/Il2CppInspector.Common/Plugins/API/V100/Hooks.cs
@@ -9,8 +9,20 @@ using System.IO;
 using NoisyCowStudios.Bin2Object;
 using Il2CppInspector.Reflection;
 
+// Hooks we provide to plugins which can choose whether or not to provide implementations
 namespace Il2CppInspector.PluginAPI.V100
 {
+    /// <summary>
+    /// Executes when the plugin's options are updated by the user
+    /// Not called on first load (with the default, possibly incomplete options provided by the plugin author)
+    /// Do not perform any long-running operations here
+    /// Implementation is optional - the default is to do nothing
+    /// </summary>
+    public partial interface IPlugin
+    {
+        void OptionsChanged(PluginOptionsChangedEventInfo e) { }
+    }
+
     /// <summary>
     /// Process global-metadata.dat when it is first opened as a sequence of bytes
     /// Seek cursor will be at the start of the file
diff --git a/Il2CppInspector.Common/Plugins/API/V100/IPlugin.cs b/Il2CppInspector.Common/Plugins/API/V100/IPlugin.cs
index 1a03028..0f08b07 100644
--- a/Il2CppInspector.Common/Plugins/API/V100/IPlugin.cs
+++ b/Il2CppInspector.Common/Plugins/API/V100/IPlugin.cs
@@ -11,7 +11,7 @@ namespace Il2CppInspector.PluginAPI.V100
     /// <summary>
     /// Core interface that all plugins must implement
     /// </summary>
-    public interface IPlugin
+    public partial interface IPlugin
     {
         /// <summary>
         /// Plugin name for CLI and unique ID
diff --git a/Il2CppInspector.Common/Plugins/API/V100/PluginEventInfo.cs b/Il2CppInspector.Common/Plugins/API/V100/PluginEventInfo.cs
index d3b2861..a9eeb1d 100644
--- a/Il2CppInspector.Common/Plugins/API/V100/PluginEventInfo.cs
+++ b/Il2CppInspector.Common/Plugins/API/V100/PluginEventInfo.cs
@@ -61,6 +61,11 @@ namespace Il2CppInspector.PluginAPI.V100
         public bool SkipValidation { get; set; }
     }
 
+    /// <summary>
+    /// Event info for OptionsChanged
+    /// </summary>
+    public class PluginOptionsChangedEventInfo : PluginEventInfo { }
+
     /// <summary>
     /// Event info for PostProcessMetadata
     /// </summary>
diff --git a/Il2CppInspector.Common/Plugins/PluginHooks.cs b/Il2CppInspector.Common/Plugins/PluginHooks.cs
index 78a1544..38388fc 100644
--- a/Il2CppInspector.Common/Plugins/PluginHooks.cs
+++ b/Il2CppInspector.Common/Plugins/PluginHooks.cs
@@ -12,7 +12,8 @@ using Il2CppInspector.Reflection;
 
 namespace Il2CppInspector
 {
-    // Hooks we provide to plugins which can choose whether or not to provide implementations
+    // Internal helpers to call the same hook on every plugin
+    // Does not include hooks that should be called individually, eg. OptionsChanged
     internal static class PluginHooks
     {
         public static PluginPreProcessMetadataEventInfo PreProcessMetadata(BinaryObjectStream stream)
diff --git a/Il2CppInspector.Common/Plugins/PluginManager.cs b/Il2CppInspector.Common/Plugins/PluginManager.cs
index 44c2463..3d15bcf 100644
--- a/Il2CppInspector.Common/Plugins/PluginManager.cs
+++ b/Il2CppInspector.Common/Plugins/PluginManager.cs
@@ -220,6 +220,21 @@ namespace Il2CppInspector
             }
         }
 
+        // Commit options change for the specified plugin
+        public static PluginOptionsChangedEventInfo OptionsChanged(IPlugin plugin) {
+            var eventInfo = new PluginOptionsChangedEventInfo();
+
+            try {
+                plugin.OptionsChanged(eventInfo);
+            }
+            catch (Exception ex) {
+                eventInfo.Error = new PluginErrorEventArgs { Plugin = plugin, Exception = ex, Operation = "options update" };
+                ErrorHandler?.Invoke(AsInstance, eventInfo.Error);
+            }
+
+            return eventInfo;
+        }
+
         // Try to cast each enabled plugin to a specific interface type, and for those supporting the interface, execute the supplied delegate
         // Errors will be forwarded to the error handler
         internal static E Try<I, E>(Action<I, E> action) where E : PluginEventInfo, new()
diff --git a/Il2CppInspector.GUI/PluginConfigurationDialog.xaml.cs b/Il2CppInspector.GUI/PluginConfigurationDialog.xaml.cs
index efe25e6..cf3593c 100644
--- a/Il2CppInspector.GUI/PluginConfigurationDialog.xaml.cs
+++ b/Il2CppInspector.GUI/PluginConfigurationDialog.xaml.cs
@@ -24,6 +24,7 @@ using System.Text.RegularExpressions;
 using System.Linq;
 using Il2CppInspector.PluginAPI.V100;
 using Il2CppInspector.Reflection;
+using Il2CppInspector;
 
 namespace Il2CppInspectorGUI
 { 
@@ -126,8 +127,6 @@ namespace Il2CppInspectorGUI
         private void okButton_Click(object sender, RoutedEventArgs e) {
             // Close dialog box but call OnClosing first to validate all the options
             DialogResult = true;
-
-            // TODO: Plugin hook OptionsChanged (and make sure it works when clicking close icon as well)
         }
 
         // Select a file path
@@ -168,6 +167,7 @@ namespace Il2CppInspectorGUI
                 MessageBox.Show("One or more options are invalid.", "Il2CppInspector Plugin Configuration");
                 e.Cancel = true;
             }
+            PluginManager.OptionsChanged(Plugin);
         }
     }
 }
diff --git a/Il2CppInspector.GUI/PluginManagerDialog.xaml.cs b/Il2CppInspector.GUI/PluginManagerDialog.xaml.cs
index bef4fda..8a9eccc 100644
--- a/Il2CppInspector.GUI/PluginManagerDialog.xaml.cs
+++ b/Il2CppInspector.GUI/PluginManagerDialog.xaml.cs
@@ -107,6 +107,5 @@ namespace Il2CppInspector.GUI
         private void getPluginsButton_Click(object sender, RoutedEventArgs e) {
             Process.Start(new ProcessStartInfo { FileName = @"https://github.com/djkaty/Il2CppInspectorPlugins", UseShellExecute = true });
         }
-
     }
 }
diff --git a/Il2CppTests/TestRunner.cs b/Il2CppTests/TestRunner.cs
index bc01dfe..15c549b 100644
--- a/Il2CppTests/TestRunner.cs
+++ b/Il2CppTests/TestRunner.cs
@@ -107,8 +107,8 @@ namespace Il2CppInspector
                             ourPlugin[key] = Convert.ChangeType(value, targetType);
                         }
                     }
-                    // TODO: Plugin hook OptionsChanged
                 }
+                PluginManager.OptionsChanged(plugin);
             }
 
             List<Il2CppInspector> inspectors;