diff --git a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdateManager.java b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdateManager.java
index 0e101a408..d77129bae 100644
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdateManager.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/mailbox/MailboxUpdateManager.java
@@ -20,7 +20,7 @@ public interface MailboxUpdateManager {
 	/**
 	 * The current major version of the mailbox update (properties) client.
 	 */
-	int MAJOR_VERSION = 1;
+	int MAJOR_VERSION = 2;
 
 	/**
 	 * The current minor version of the mailbox update (properties) client.