diff --git a/DocuMentor.spec b/DocuMentor.spec
index ae216c3..b05638b 100644
--- a/DocuMentor.spec
+++ b/DocuMentor.spec
@@ -4,7 +4,10 @@ PyInstaller Konfiguration für DocuMentor
 Erstellt eine eigenständige Windows-Executable ohne Python-Installation
 """
 
+import json
 import sys
+from importlib.metadata import PackageNotFoundError
+from importlib.metadata import version as pkg_version
 from pathlib import Path
 from PyInstaller.utils.hooks import collect_all
 
@@ -14,6 +17,22 @@ block_cipher = None
 project_root = Path(SPECPATH)
 src_path = project_root / 'src'
 
+# Versions-Snapshot erzeugen und ins Bundle einbetten
+_packages_to_snapshot = [
+    "PySide6", "pydantic", "pydantic-settings", "pydantic-yaml",
+    "polars", "connectorx", "pyarrow", "psutil", "lxml",
+    "ruff", "pyinstaller", "pillow",
+]
+_versions_snapshot: dict[str, str] = {}
+for _pkg in _packages_to_snapshot:
+    try:
+        _versions_snapshot[_pkg.lower()] = pkg_version(_pkg)
+    except PackageNotFoundError:
+        _versions_snapshot[_pkg.lower()] = ""
+
+_versions_file = project_root / "versions.json"
+_versions_file.write_text(json.dumps(_versions_snapshot), encoding="utf-8")
+
 # connectorx komplett sammeln (Python-Code, native .pyd und Metadaten)
 # PyInstaller erkennt connectorx nicht automatisch, da es zur Laufzeit
 # von polars per importlib.import_module() geladen wird
@@ -36,6 +55,7 @@ a = Analysis(
     datas=ui_files + res_files + cx_datas + [
         (str(project_root / 'pyproject.toml'), '.'),
         (str(project_root / 'THIRD_PARTY_LICENSES.txt'), '.'),
+        (str(_versions_file), '.'),
         (str(project_root / 'resources' / 'icon.ico'), 'resources'),
     ],
     hiddenimports=[
diff --git a/DocuMentor.wxs b/DocuMentor.wxs
index 7559b66..4533845 100644
--- a/DocuMentor.wxs
+++ b/DocuMentor.wxs
@@ -4,7 +4,7 @@
   <!-- Paket-Definition (ersetzt Product in v4) -->
   <Package 
     Name="DocuMentor" 
-    Version="1.6.5"
+    Version="1.6.6"
     Manufacturer="Vitali Graf / Software- und Datenbankentwicklung" 
     UpgradeCode="F498B66C-726D-44AA-95F4-CB4FBDCEF26E"
     Language="1031"
diff --git a/THIRD_PARTY_LICENSES.txt b/THIRD_PARTY_LICENSES.txt
index 0a831dc..7badfec 100644
--- a/THIRD_PARTY_LICENSES.txt
+++ b/THIRD_PARTY_LICENSES.txt
@@ -253,5 +253,5 @@ HINWEISE
 
 ================================================================================
 Stand: April 2026
-Erstellt für: DocuMentor v1.6.5
+Erstellt für: DocuMentor v1.6.6
 ================================================================================
diff --git a/installer.iss b/installer.iss
index 59f8b6a..b9a6aa8 100644
--- a/installer.iss
+++ b/installer.iss
@@ -10,7 +10,7 @@
 ; Build-Befehl: iscc installer.iss
 
 #define MyAppName "DocuMentor"
-#define MyAppVersion "1.6.5"
+#define MyAppVersion "1.6.6"
 #define MyAppPublisher "Ihr Name/Organisation"
 #define MyAppURL "https://github.com/yourusername/xsl-validator"
 #define MyAppExeName "DocuMentor.exe"
diff --git a/pyproject.toml b/pyproject.toml
index ecb10ba..39b81cf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "DocuMentor"
-version = "1.6.5"
+version = "1.6.6"
 description = "Professionelle XSL-Transformations-Verwaltung und PDF-Generierung"
 readme = "README.md"
 license = {text = "MIT"}
diff --git a/src/license_parser.py b/src/license_parser.py
index bd82703..2d5f484 100644
--- a/src/license_parser.py
+++ b/src/license_parser.py
@@ -2,8 +2,10 @@
 Parser für THIRD_PARTY_LICENSES.txt.
 
 Extrahiert strukturierte Lizenzinformationen und ergänzt sie
-mit den tatsächlich installierten Paketversionen via importlib.metadata.
+mit den tatsächlich installierten Paketversionen via importlib.metadata
+oder (im PyInstaller-Bundle) aus der mitgebündelten versions.json.
 """
+import json
 import logging
 import re
 import sys
@@ -71,8 +73,29 @@ def _normalize_package_name(display_name: str) -> str:
     return display_name.lower().split("(")[0].strip()
 
 
+_bundled_versions: dict[str, str] | None = None
+
+
+def _load_bundled_versions() -> dict[str, str]:
+    """Lädt den Versions-Snapshot aus der mitgebündelten versions.json (nur im PyInstaller-Bundle)."""
+    global _bundled_versions
+    if _bundled_versions is None:
+        if hasattr(sys, "_MEIPASS"):
+            versions_file = Path(sys._MEIPASS) / "versions.json"  # type: ignore[attr-defined]
+            if versions_file.exists():
+                _bundled_versions = json.loads(versions_file.read_text(encoding="utf-8"))
+            else:
+                _bundled_versions = {}
+        else:
+            _bundled_versions = {}
+    return _bundled_versions
+
+
 def _get_installed_version(package_name: str) -> str:
     """Ermittelt die installierte Version eines Pakets."""
+    bundled = _load_bundled_versions()
+    if bundled:
+        return bundled.get(package_name.lower(), "")
     try:
         return version(package_name)
     except PackageNotFoundError:
diff --git a/uv.lock b/uv.lock
index 39420d2..27ea208 100644
--- a/uv.lock
+++ b/uv.lock
@@ -39,7 +39,7 @@ wheels = [
 
 [[package]]
 name = "documentor"
-version = "1.6.5"
+version = "1.6.6"
 source = { virtual = "." }
 dependencies = [
     { name = "connectorx" },