diff --git a/nbt/src/main/java/core/nbt/serialization/Serializer.java b/nbt/src/main/java/core/nbt/serialization/Serializer.java
index a9fa0d3..db387be 100644
--- a/nbt/src/main/java/core/nbt/serialization/Serializer.java
+++ b/nbt/src/main/java/core/nbt/serialization/Serializer.java
@@ -4,6 +4,7 @@
 import core.nbt.serialization.adapter.BooleanAdapter;
 import core.nbt.serialization.adapter.ByteAdapter;
 import core.nbt.serialization.adapter.DoubleAdapter;
+import core.nbt.serialization.adapter.DurationAdapter;
 import core.nbt.serialization.adapter.FileAdapter;
 import core.nbt.serialization.adapter.FloatAdapter;
 import core.nbt.serialization.adapter.IntegerAdapter;
@@ -17,6 +18,7 @@
 import java.io.File;
 import java.lang.reflect.Type;
 import java.net.InetSocketAddress;
+import java.time.Duration;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
@@ -33,6 +35,7 @@ public Serializer() {
         registerTypeAdapter(Boolean.class, BooleanAdapter.INSTANCE);
         registerTypeAdapter(Byte.class, ByteAdapter.INSTANCE);
         registerTypeAdapter(Double.class, DoubleAdapter.INSTANCE);
+        registerTypeAdapter(Duration.class, DurationAdapter.INSTANCE);
         registerTypeAdapter(File.class, FileAdapter.INSTANCE);
         registerTypeAdapter(Float.class, FloatAdapter.INSTANCE);
         registerTypeAdapter(InetSocketAddress.class, AddressAdapter.INSTANCE);
diff --git a/nbt/src/main/java/core/nbt/serialization/adapter/DurationAdapter.java b/nbt/src/main/java/core/nbt/serialization/adapter/DurationAdapter.java
new file mode 100644
index 0000000..9307956
--- /dev/null
+++ b/nbt/src/main/java/core/nbt/serialization/adapter/DurationAdapter.java
@@ -0,0 +1,27 @@
+
+package core.nbt.serialization.adapter;
+
+import core.nbt.serialization.ParserException;
+import core.nbt.serialization.TagAdapter;
+import core.nbt.serialization.TagDeserializationContext;
+import core.nbt.serialization.TagSerializationContext;
+import core.nbt.tag.LongTag;
+import core.nbt.tag.Tag;
+import org.jspecify.annotations.NullMarked;
+
+import java.time.Duration;
+
+@NullMarked
+public class DurationAdapter implements TagAdapter<Duration> {
+    public static final DurationAdapter INSTANCE = new DurationAdapter();
+
+    @Override
+    public Duration deserialize(Tag tag, TagDeserializationContext context) throws ParserException {
+        return Duration.ofMillis(tag.getAsLong());
+    }
+
+    @Override
+    public Tag serialize(Duration duration, TagSerializationContext context) throws ParserException {
+        return new LongTag(duration.toMillis());
+    }
+}