diff --git a/.bsd3-license-header.tmpl b/.bsd3-license-header.tmpl
new file mode 100644
index 0000000..96c67ac
--- /dev/null
+++ b/.bsd3-license-header.tmpl
@@ -0,0 +1,5 @@
+Copyright (c) $years, $owner
+All rights reserved.
+
+This source code is licensed under the BSD-3-Clause license found in the
+LICENSE file in the root directory of this source tree.
diff --git a/pyproject.toml b/pyproject.toml
index 4545874..cbf3b98 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ authors = [
 ]
 readme = "README.md"
 requires-python = "~=3.13"
+license = {text = "BSD-3-Clause"}
 
 dependencies = [
     "PySide6~=6.8.0",
diff --git a/src/semeion/__init__.py b/src/semeion/__init__.py
index 919637e..5e2b80d 100644
--- a/src/semeion/__init__.py
+++ b/src/semeion/__init__.py
@@ -1,3 +1,10 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
 """semeion semantic post-mortem forensics"""
 
 __version__ = "0.0.0"
diff --git a/src/semeion/ingestion_engines/__init__.py b/src/semeion/ingestion_engines/__init__.py
index da2e027..78aa199 100644
--- a/src/semeion/ingestion_engines/__init__.py
+++ b/src/semeion/ingestion_engines/__init__.py
@@ -1,3 +1,11 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
+
 # from .browserSqlite import BrowserSqliteEngine
 # from .forensicImage import ForensicImageEngine
 
diff --git a/src/semeion/ingestion_engines/browserSqlite/__init__.py b/src/semeion/ingestion_engines/browserSqlite/__init__.py
index 001a0ac..72f9686 100644
--- a/src/semeion/ingestion_engines/browserSqlite/__init__.py
+++ b/src/semeion/ingestion_engines/browserSqlite/__init__.py
@@ -1,3 +1,11 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
+
 # TODO: implement browser SQlite database converter -> semeion object
 # adapt browser2timesketch.py
 
diff --git a/src/semeion/ingestion_engines/forensicImage/__init__.py b/src/semeion/ingestion_engines/forensicImage/__init__.py
index 9e08fd8..2b02e87 100644
--- a/src/semeion/ingestion_engines/forensicImage/__init__.py
+++ b/src/semeion/ingestion_engines/forensicImage/__init__.py
@@ -1,3 +1,11 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
+
 # TODO: use pytsk to import forensic images and convert to semeion objects
 
 __all__ = []
\ No newline at end of file
diff --git a/src/semeion/interfaces/__init__.py b/src/semeion/interfaces/__init__.py
index ab132f5..ce9dc02 100644
--- a/src/semeion/interfaces/__init__.py
+++ b/src/semeion/interfaces/__init__.py
@@ -1,3 +1,11 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
+
 # from .llm import LLMClient
 # from .qdrant import QdrantClient
 
diff --git a/src/semeion/interfaces/embeddings/__init__.py b/src/semeion/interfaces/embeddings/__init__.py
index abb024e..b8dc139 100644
--- a/src/semeion/interfaces/embeddings/__init__.py
+++ b/src/semeion/interfaces/embeddings/__init__.py
@@ -1,3 +1,11 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
+
 # TODO: implement connection to embeddings provider
 
 __all__ = []
\ No newline at end of file
diff --git a/src/semeion/interfaces/llm/__init__.py b/src/semeion/interfaces/llm/__init__.py
index 80d9f1b..7cee909 100644
--- a/src/semeion/interfaces/llm/__init__.py
+++ b/src/semeion/interfaces/llm/__init__.py
@@ -1,3 +1,11 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
+
 # TODO: implement connection to openAI compatible endpoint
 
 __all__ = []
\ No newline at end of file
diff --git a/src/semeion/interfaces/qdrant/__init__.py b/src/semeion/interfaces/qdrant/__init__.py
index 71b66e7..b015ad6 100644
--- a/src/semeion/interfaces/qdrant/__init__.py
+++ b/src/semeion/interfaces/qdrant/__init__.py
@@ -1,3 +1,11 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
+
 # TODO: implement qdrant connector
 
 __all__ = []
\ No newline at end of file
diff --git a/src/semeion/main.py b/src/semeion/main.py
index 775454d..b69a6b2 100644
--- a/src/semeion/main.py
+++ b/src/semeion/main.py
@@ -1,3 +1,10 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
 from .ui import MainWindow, SemeionInstance
 
 def main():
diff --git a/src/semeion/ui/__init__.py b/src/semeion/ui/__init__.py
index 66faed6..c8591bc 100644
--- a/src/semeion/ui/__init__.py
+++ b/src/semeion/ui/__init__.py
@@ -1,3 +1,10 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
 from .main_window import MainWindow, SemeionInstance
 
 __all__ = ["MainWindow", "SemeionInstance"]
\ No newline at end of file
diff --git a/src/semeion/ui/main_window.py b/src/semeion/ui/main_window.py
index c64e52c..74364c0 100644
--- a/src/semeion/ui/main_window.py
+++ b/src/semeion/ui/main_window.py
@@ -1,3 +1,10 @@
+#
+# Copyright (c) 2025, mstoeck3
+# All rights reserved.
+#
+# This source code is licensed under the BSD-3-Clause license found in the
+# LICENSE file in the root directory of this source tree.
+#
 from PySide6.QtWidgets import QApplication, QWidget, QVBoxLayout, QLabel, QPushButton, QGridLayout, QLineEdit, QToolBar
 from PySide6.QtGui import QAction
 from PySide6.QtCore import Qt