diff --git a/bedrock-codec/src/main/java/org/cloudburstmc/protocol/bedrock/codec/v685/Bedrock_v685.java b/bedrock-codec/src/main/java/org/cloudburstmc/protocol/bedrock/codec/v685/Bedrock_v685.java
index 5f39d05ec..6f0514fc1 100644
--- a/bedrock-codec/src/main/java/org/cloudburstmc/protocol/bedrock/codec/v685/Bedrock_v685.java
+++ b/bedrock-codec/src/main/java/org/cloudburstmc/protocol/bedrock/codec/v685/Bedrock_v685.java
@@ -51,7 +51,7 @@ public class Bedrock_v685 extends Bedrock_v671 {
 
     protected static final EntityDataTypeMap ENTITY_DATA = Bedrock_v671.ENTITY_DATA
             .toBuilder()
-            .insert(EntityDataTypes.VISIBLE_MOB_EFFECTS, 131, EntityDataFormat.NBT) // TODO check data format
+            .insert(EntityDataTypes.VISIBLE_MOB_EFFECTS, 131, EntityDataFormat.LONG)
             .build();
 
     protected static final TypeMap<LevelEventType> LEVEL_EVENTS = Bedrock_v671.LEVEL_EVENTS.toBuilder()
diff --git a/bedrock-codec/src/main/java/org/cloudburstmc/protocol/bedrock/data/entity/EntityDataTypes.java b/bedrock-codec/src/main/java/org/cloudburstmc/protocol/bedrock/data/entity/EntityDataTypes.java
index 6d5ffe29f..8a3b8e8f4 100644
--- a/bedrock-codec/src/main/java/org/cloudburstmc/protocol/bedrock/data/entity/EntityDataTypes.java
+++ b/bedrock-codec/src/main/java/org/cloudburstmc/protocol/bedrock/data/entity/EntityDataTypes.java
@@ -275,5 +275,5 @@ public boolean isInstance(Object value) {
     /**
      * @since v685
      */
-    public static final EntityDataType<NbtMap> VISIBLE_MOB_EFFECTS = new EntityDataType<>(NbtMap.class, "VISIBLE_MOB_EFFECTS");
+    public static final EntityDataType<Long> VISIBLE_MOB_EFFECTS = new EntityDataType<>(Long.class, "VISIBLE_MOB_EFFECTS");
 }