diff --git a/pom.xml b/pom.xml
index b0c45ca..d49376f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -209,7 +209,7 @@
         <dependency>
             <groupId>com.github.DeadSilenceIV</groupId>
             <artifactId>AdvancedChestsAPI</artifactId>
-            <version>1.8</version>
+            <version>2.9-BETA</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
diff --git a/src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java b/src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java
index 065f5e0..9c9fb43 100644
--- a/src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java
+++ b/src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java
@@ -425,11 +425,11 @@ public class IslandLevelCalculator {
         for (BlockState bs : chunk.getTileEntities()) {
             if (bs instanceof Container) {
                 if (addon.isAdvChestEnabled()) {
-                    AdvancedChest aChest = AdvancedChestsAPI.getChestManager().getAdvancedChest(bs.getLocation());
-                    if (aChest != null) {
+                    AdvancedChest<?,?> aChest = AdvancedChestsAPI.getChestManager().getAdvancedChest(bs.getLocation());
+                    if (aChest != null && aChest.getChestType().getName().equals("NORMAL")) {
                         aChest.getPages().stream().map(ChestPage::getItems).forEach(c -> {
-                            for (ItemStack i : c) {
-                                countItemStack(i);
+                            for (Object i : c) {
+                                countItemStack((ItemStack)i);
                             }
                         });
                         continue;