diff --git a/lib/openxliff.jar b/lib/openxliff.jar
index 81427bb..2f3d1bb 100644
Binary files a/lib/openxliff.jar and b/lib/openxliff.jar differ
diff --git a/src/com/maxprograms/converters/Constants.java b/src/com/maxprograms/converters/Constants.java
index 33c2875..d081357 100644
--- a/src/com/maxprograms/converters/Constants.java
+++ b/src/com/maxprograms/converters/Constants.java
@@ -20,7 +20,7 @@ private Constants() {
 	public static final String TOOLID = "OpenXLIFF";
 	public static final String TOOLNAME = "OpenXLIFF Filters";
 	public static final String VERSION = "2.9.0";
-	public static final String BUILD = "20221021_0853";
+	public static final String BUILD = "20221022_0824";
 
 	public static final String SUCCESS = "0";
 	public static final String ERROR = "1";
diff --git a/src/com/maxprograms/converters/Join.java b/src/com/maxprograms/converters/Join.java
index ff0da09..18a33c5 100644
--- a/src/com/maxprograms/converters/Join.java
+++ b/src/com/maxprograms/converters/Join.java
@@ -168,6 +168,7 @@ public static void join(List<String> xliffs, String out)
 			writeString(output, ">\n");
 
 			Iterator<String> it = xliffs.iterator();
+			int count = 0;
 			while (it.hasNext()) {
 				String xliff = it.next();
 				Document doc = builder.build(xliff);
@@ -178,6 +179,9 @@ public static void join(List<String> xliffs, String out)
 					Element file = files1.get(i);
 					String original = file.getAttributeValue("original");
 					file.setAttribute("original", Utils.makeRelativePath(treeRoot, original));
+					if (version.startsWith("2")) {
+						file.setAttribute("id", "" + count++);
+					}
 					Indenter.indent(file, 2, 2);
 					writeString(output, "  ");
 					file.writeBytes(output, StandardCharsets.UTF_8);