diff --git a/src/main/engine/net/sf/jailer/JailerVersion.java b/src/main/engine/net/sf/jailer/JailerVersion.java
index c4c968d40..9e1289986 100644
--- a/src/main/engine/net/sf/jailer/JailerVersion.java
+++ b/src/main/engine/net/sf/jailer/JailerVersion.java
@@ -30,7 +30,7 @@ public class JailerVersion {
 	/**
 	 * The Jailer working tables version.
 	 */
-	public static final int WORKING_TABLE_VERSION = 3;
+	public static final int WORKING_TABLE_VERSION = 4;
 
 	/**
 	 * The Jailer application name.