diff --git a/src/main/java/net/runelite/cache/fs/IndexFile.java b/src/main/java/net/runelite/cache/fs/IndexFile.java
index 527931a482..633371bb8d 100644
--- a/src/main/java/net/runelite/cache/fs/IndexFile.java
+++ b/src/main/java/net/runelite/cache/fs/IndexFile.java
@@ -1,5 +1,6 @@
 package net.runelite.cache.fs;
 
+import java.io.Closeable;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -7,7 +8,7 @@ import java.io.RandomAccessFile;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public class IndexFile
+public class IndexFile implements Closeable
 {
 	private static final Logger logger = LoggerFactory.getLogger(IndexFile.class);
 	private static final int INDEX_ENTRY_LEN = 6;
@@ -24,6 +25,12 @@ public class IndexFile
 		this.idx = new RandomAccessFile(file, "rw");
 	}
 	
+	@Override
+	public void close() throws IOException
+	{
+		idx.close();
+	}
+	
 	public synchronized void write(IndexEntry entry) throws IOException
 	{
 		idx.seek(entry.getId() * INDEX_ENTRY_LEN);