diff --git a/plugin/src/main/java/io/github/zrdzn/minecraft/lovelydrop/drop/DropListener.java b/plugin/src/main/java/io/github/zrdzn/minecraft/lovelydrop/drop/DropListener.java
index 0682b4d..82bdbb0 100644
--- a/plugin/src/main/java/io/github/zrdzn/minecraft/lovelydrop/drop/DropListener.java
+++ b/plugin/src/main/java/io/github/zrdzn/minecraft/lovelydrop/drop/DropListener.java
@@ -69,7 +69,7 @@ public void onSourceBreak(BlockBreakEvent event) {
         // Get all drops from the source.
         Set<Entry<String, DropConfig>> drops = this.config.getDrops().entrySet().stream()
                 .filter(drop -> !userSetting.hasDisabledDrop(drop.getKey()))
-                .filter(drop -> drop.getValue().getDisabledBioms().contains(block.getBiome()))
+                .filter(drop -> !drop.getValue().getDisabledBioms().contains(block.getBiome()))
                 .filter(drop -> drop.getValue().getSource().getType() == block.getType())
                 .filter(drop -> drop.getValue().getSource().getDurability() == block.getData())
                 .collect(Collectors.toSet());