diff --git a/asammdf/blocks/v4_blocks.py b/asammdf/blocks/v4_blocks.py
index 243761505..5681c2b7e 100644
--- a/asammdf/blocks/v4_blocks.py
+++ b/asammdf/blocks/v4_blocks.py
@@ -5520,7 +5520,7 @@ def to_blocks(self, address: int, blocks: list[Any]) -> int:
                 for e in common_properties:
                     name = e.get("name")
                     if name == "project":
-                        e.text = self.author
+                        e.text = self.project
                         break
                 else:
                     project = ET.SubElement(
@@ -5530,7 +5530,7 @@ def to_blocks(self, address: int, blocks: list[Any]) -> int:
                 for e in common_properties:
                     name = e.get("name")
                     if name == "subject":
-                        e.text = self.author
+                        e.text = self.subject
                         break
                 else:
                     subject = ET.SubElement(