diff --git a/src/main/java/com/almostreliable/merequester/requester/StorageManager.java b/src/main/java/com/almostreliable/merequester/requester/StorageManager.java
index 78edc8f..21f629d 100644
--- a/src/main/java/com/almostreliable/merequester/requester/StorageManager.java
+++ b/src/main/java/com/almostreliable/merequester/requester/StorageManager.java
@@ -34,6 +34,9 @@ public Storage get(int slot) {
     public void updateWatcher(IStackWatcher newWatcher) {
         stackWatcher = newWatcher;
         resetWatcher();
+        for (var i = 0; i < storages.length; i++) {
+            computeKnownAmount(i);
+        }
     }
 
     @Override