diff --git a/http-api/src/main/java/net/runelite/http/api/gson/InstantTypeAdapter.java b/http-api/src/main/java/net/runelite/http/api/gson/InstantTypeAdapter.java
index bf92af94b8..d5162c0e01 100644
--- a/http-api/src/main/java/net/runelite/http/api/gson/InstantTypeAdapter.java
+++ b/http-api/src/main/java/net/runelite/http/api/gson/InstantTypeAdapter.java
@@ -43,12 +43,7 @@ public class InstantTypeAdapter extends TypeAdapter<Instant>
 			return;
 		}
 
-		out.beginObject()
-			.name("seconds")
-			.value(value.getEpochSecond())
-			.name("nanos")
-			.value(value.getNano())
-			.endObject();
+		out.value(value.toEpochMilli());
 	}
 
 	@Override
@@ -60,6 +55,12 @@ public class InstantTypeAdapter extends TypeAdapter<Instant>
 			return null;
 		}
 
+		if (in.peek() == JsonToken.NUMBER)
+		{
+			long jsTime = in.nextLong();
+			return Instant.ofEpochMilli(jsTime);
+		}
+
 		long seconds = 0;
 		int nanos = 0;
 		in.beginObject();
diff --git a/http-api/src/test/java/net/runelite/http/api/gson/InstantTypeAdapterTest.java b/http-api/src/test/java/net/runelite/http/api/gson/InstantTypeAdapterTest.java
index dab70a4f96..f9ed850843 100644
--- a/http-api/src/test/java/net/runelite/http/api/gson/InstantTypeAdapterTest.java
+++ b/http-api/src/test/java/net/runelite/http/api/gson/InstantTypeAdapterTest.java
@@ -34,15 +34,20 @@ public class InstantTypeAdapterTest
 	@Test
 	public void test()
 	{
-		test("null", null);
-		test("{\"seconds\":1609538310,\"nanos\":291698903}", Instant.ofEpochSecond(1609538310, 291698903));
+		test("null", null, true);
+		test("{\"seconds\":1609538310,\"nanos\":291000000}", Instant.ofEpochSecond(1609538310, 291_000_000), false);
+		test("1609538310291", Instant.ofEpochSecond(1609538310, 291_000_000), true);
 	}
 
-	private void test(String json, Instant object)
+	private void test(String json, Instant object, boolean exactEncoding)
 	{
 		Instant parsed = RuneLiteAPI.GSON.fromJson(json, Instant.class);
 		Assert.assertEquals(object, parsed);
 		String serialized = RuneLiteAPI.GSON.toJson(object);
+		if (exactEncoding)
+		{
+			Assert.assertEquals(json, serialized);
+		}
 		Instant roundTripped = RuneLiteAPI.GSON.fromJson(serialized, Instant.class);
 		Assert.assertEquals(object, roundTripped);
 	}
diff --git a/http-service/src/test/java/net/runelite/http/service/loottracker/LootTrackerControllerTest.java b/http-service/src/test/java/net/runelite/http/service/loottracker/LootTrackerControllerTest.java
index 685479a638..68e64270d6 100644
--- a/http-service/src/test/java/net/runelite/http/service/loottracker/LootTrackerControllerTest.java
+++ b/http-service/src/test/java/net/runelite/http/service/loottracker/LootTrackerControllerTest.java
@@ -26,6 +26,7 @@ package net.runelite.http.service.loottracker;
 
 import java.io.IOException;
 import java.time.Instant;
+import java.time.temporal.ChronoField;
 import java.util.Collections;
 import java.util.UUID;
 import javax.servlet.http.HttpServletRequest;
@@ -88,7 +89,7 @@ public class LootTrackerControllerTest
 	{
 		LootRecord lootRecord = new LootRecord();
 		lootRecord.setType(LootRecordType.NPC);
-		lootRecord.setTime(Instant.now());
+		lootRecord.setTime(Instant.now().with(ChronoField.NANO_OF_SECOND, 0));
 		lootRecord.setDrops(Collections.singletonList(new GameItem(4151, 1)));
 
 		String data = RuneLiteAPI.GSON.toJson(Collections.singletonList(lootRecord));