diff --git a/requirements.txt b/requirements.txt
index 01d9a29a64b132d0b5e03a03c8717d1a82417043..2f9bcc4aeebbed35ef1b113f47c7c74c48eca37d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 PyQt5==5.15.4
 PyQt5-Qt5==5.15.2
 PyQt5-sip==12.12.2
-PyQtWebEngine==5.15.6
+#PyQtWebEngine==5.15.6
 pyqtgraph>=0.12.1
 matplotlib>=3.4.1
 numpy>=1.24.2
diff --git a/src/View/MainWindow.py b/src/View/MainWindow.py
index 8539af1db3e39cf0f8fc65475dcf744e601e1c42..cf7e08a76213e4fab32599431f179639c87da8c9 100644
--- a/src/View/MainWindow.py
+++ b/src/View/MainWindow.py
@@ -16,7 +16,7 @@
 
 # -*- coding: utf-8 -*-
 
-import os
+import os, sys
 import logging
 import subprocess
 from queue import Queue
@@ -56,9 +56,17 @@ from View.SolverParameters.Window import SolverParametersWindow
 from View.RunSolver.Window import SelectSolverWindow, SolverLogWindow
 from View.CheckList.Window import CheckListWindow
 from View.Results.Window import ResultsWindow
-from View.Doc.Window import DocWindow
 from View.Debug.Window import ReplWindow
 
+# Optional internal display of documentation for make the application
+# package lighter...
+try:
+    from View.Doc.Window import DocWindow
+    _doc = "internal"
+except Exception as e:
+    print("Handle exception: {e}")
+    _doc = "external"
+
 from Model.Study import Study
 
 logger = logging.getLogger()
@@ -132,6 +140,9 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
         if self.conf.last_study != "" and not self.conf.close_correctly:
             self.dialog_reopen_study()
 
+        if _doc == "external":
+            logger.info("doc: Internal documentation is not available...")
+
     def set_title(self):
         title = "(dbg) " if self.conf.debug else ""
 
@@ -726,16 +737,36 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
     # DOCUMENTATION #
     #################
 
+    def _doc_path_file(self, filename):
+        if ".py" in sys.argv[0]:
+            return os.path.abspath(
+                os.path.join(
+                    os.path.dirname(__file__),
+                    "..", "..", "doc", filename
+                )
+            )
+
+        return os.path.abspath(
+            os.path.join(
+                os.path.dirname(__file__),
+                "..", "..", "..", "doc", filename
+            )
+        )
+
     def open_doc(self, filename):
-        if ".odt" in filename:
-            url = QUrl(f"file://{DocWindow._path_file(filename)}")
+        if _doc == "external":
+            url = QUrl(f"file://{self._doc_path_file(filename)}")
             QDesktopServices.openUrl(url)
         else:
-            doc = DocWindow(
-                filename =  filename,
-                parent = self
-            )
-            doc.show()
+            if ".odt" in filename:
+                url = QUrl(f"file://{DocWindow._path_file(filename)}")
+                QDesktopServices.openUrl(url)
+            else:
+                doc = DocWindow(
+                    filename =  filename,
+                    parent = self
+                )
+                doc.show()
 
     def open_doc_user(self, ext="pdf"):
         self.open_doc(f"Pamhyr2-users.{ext}")