diff --git a/pyplayready/__init__.py b/pyplayready/__init__.py
index f71132f..958acde 100644
--- a/pyplayready/__init__.py
+++ b/pyplayready/__init__.py
@@ -10,4 +10,4 @@ from .session import *
 from .xml_key import *
 from .xmrlicense import *
 
-__version__ = "0.4.0"
+__version__ = "0.4.1"
diff --git a/pyplayready/main.py b/pyplayready/main.py
index 55cbf06..71dc1b5 100644
--- a/pyplayready/main.py
+++ b/pyplayready/main.py
@@ -277,9 +277,10 @@ def export_device(ctx: click.Context, prd_path: Path, out_dir: Optional[Path] =
     log.info(f"L{device.security_level} {device.get_name()}")
     log.info(f"Saving to: {out_path}")
 
-    group_key_path = out_path / "zgpriv.dat"
-    group_key_path.write_bytes(device.group_key.dumps())
-    log.info("Exported Group Key as zgpriv.dat")
+    if device.group_key:
+        group_key_path = out_path / "zgpriv.dat"
+        group_key_path.write_bytes(device.group_key.dumps())
+        log.info("Exported Group Key as zgpriv.dat")
 
     private_key_path = out_path / "zprivencr.dat"
     private_key_path.write_bytes(device.encryption_key.dumps())
diff --git a/pyproject.toml b/pyproject.toml
index 1867c6d..68a6a5d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "pyplayready"
-version = "0.4.0"
+version = "0.4.1"
 description = "pyplayready CDM (Content Decryption Module) implementation in Python."
 license = "CC BY-NC-ND 4.0"
 authors = ["DevLARLEY, Erevoc", "DevataDev"]