diff --git a/pom.xml b/pom.xml
index 037f7c5..47c1dee 100644
--- a/pom.xml
+++ b/pom.xml
@@ -205,7 +205,7 @@
         <dependency>
             <groupId>com.github.DeadSilenceIV</groupId>
             <artifactId>AdvancedChestsAPI</artifactId>
-            <version>1.4</version>
+            <version>1.6</version>
         </dependency>
     </dependencies>
 
diff --git a/src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java b/src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java
index 8a5a0c9..0b40f43 100644
--- a/src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java
+++ b/src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java
@@ -35,7 +35,7 @@ import com.google.common.collect.Multisets;
 
 import us.lynuxcraft.deadsilenceiv.advancedchests.AdvancedChestsAPI;
 import us.lynuxcraft.deadsilenceiv.advancedchests.chest.AdvancedChest;
-import us.lynuxcraft.deadsilenceiv.advancedchests.chest.ChestPage;
+import us.lynuxcraft.deadsilenceiv.advancedchests.chest.gui.page.ChestPage;
 import world.bentobox.bentobox.BentoBox;
 import world.bentobox.bentobox.database.objects.Island;
 import world.bentobox.bentobox.util.Pair;
@@ -430,7 +430,11 @@ public class IslandLevelCalculator {
                 if (addon.isAdvChestEnabled()) {
                     AdvancedChest aChest = AdvancedChestsAPI.getChestManager().getAdvancedChest(bs.getLocation());
                     if (aChest != null) {
-                        aChest.getPages().stream().map(ChestPage::getItems).forEach(c -> c.forEach(this::countItemStack));
+                        aChest.getPages().stream().map(ChestPage::getItems).forEach(c -> {
+                            for (ItemStack i : c) {
+                                countItemStack(i);
+                            }
+                        });
                         continue;
                     }
                 }