diff --git a/pgpainless-sop/src/main/java/org/pgpainless/sop/VersionImpl.java b/pgpainless-sop/src/main/java/org/pgpainless/sop/VersionImpl.java
index 7675fcb9..dbd1cf35 100644
--- a/pgpainless-sop/src/main/java/org/pgpainless/sop/VersionImpl.java
+++ b/pgpainless-sop/src/main/java/org/pgpainless/sop/VersionImpl.java
@@ -15,7 +15,7 @@ import sop.operation.Version;
 public class VersionImpl implements Version {
 
     // draft version
-    private static final String SOP_VERSION = "03";
+    private static final String SOP_VERSION = "04";
 
     @Override
     public String getName() {