diff --git a/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporter.java b/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporter.java
index cdbc2ed3..5e79f159 100644
--- a/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporter.java
+++ b/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporter.java
@@ -103,7 +103,7 @@ public class ZUGFeRDExporter {
 
     //// MAIN CLASS
     private String conformanceLevel = "U";
-    private String versionStr = "1.2.0";
+    private String versionStr = "1.3.0";
 
     // BASIC, COMFORT etc - may be set from outside.
     private String ZUGFeRDConformanceLevel = null;