diff --git a/CHANGELOG.md b/CHANGELOG.md
index d1e38eb..7789731 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,14 +6,15 @@ Date format : day/month/year
 > - `foundry-version`: Stick to the major version of FoundryVTT.
 > - `system-version`: System functionalities and Fixes.
 
-## 1.12.3 - ??/03/2025 - Fixes and Compendiums Filters
-- Added Compendiums Filters (Thx to Litasa #41)
+## 1.12.3 - ??/03/2025 - Fixes and Compendiums Filters (Thx to Litasa)
+- Added Compendiums Filters (#41)
   - Separated the reference and the page number from book reference for filtering purpose.
   - Adding filters in compendium for rarity, ring, and source.
   - Add option for GM to limit what sources is being displayed to the players in compendiums. GM can still see everything and give players items/techniques if needed.
 - Fixed Npc Generator : Actor now update correctly.
 - Fixed the sidebar's icons width on collapsed state.
 - Fixed Left/Right Click order on Gm Tools/Monitor tooltips.
+- Fixed GM Monitor now correctly update when prepared items state change.
 
 ## 1.12.2 - 16/09/2024 - Bugfixes
 - Modified : The checkbox `reverseFatigueBar` is now a drop-down with `none`/`fatigue`/`strife`/`both`, and is now an client preference.
diff --git a/system/scripts/actors/base-character-sheet.js b/system/scripts/actors/base-character-sheet.js
index 349a47b..50cc4f1 100644
--- a/system/scripts/actors/base-character-sheet.js
+++ b/system/scripts/actors/base-character-sheet.js
@@ -592,7 +592,13 @@ export class BaseCharacterSheetL5r5e extends BaseSheetL5r5e {
             data.readied = tmpItem.system.readied;
         }
 
-        tmpItem.update({ system: data });
+        // Update the Item: we need to manually notify the "Gm Monitor" as the Actor himself is not updated
+        tmpItem.update({ system: data }).then(() => {
+            // Only if this actor is watched
+            if (this.actor && game.settings.get(CONFIG.l5r5e.namespace, "gm-monitor-actors").some((uuid) => uuid === this.actor.uuid)) {
+                game.l5r5e.HelpersL5r5e.refreshLocalAndSocket("l5r5e-gm-monitor");
+            }
+        });
     }
 
     /**