diff --git a/builder/pyinstaller_build_ubuntu_gui.py b/builder/pyinstaller_build_ubuntu_gui.py
index 97bb9f25..4f8293db 100644
--- a/builder/pyinstaller_build_ubuntu_gui.py
+++ b/builder/pyinstaller_build_ubuntu_gui.py
@@ -40,6 +40,6 @@
         # "--onedir",
         "--onefile",
         "--windowed",
-        str(package_folder / "dicogis.py"),
+        str(package_folder.joinpath("ui/main.py")),
     ]
 )
diff --git a/builder/pyinstaller_build_windows_gui.py b/builder/pyinstaller_build_windows_gui.py
index 5da0b266..ec498137 100644
--- a/builder/pyinstaller_build_windows_gui.py
+++ b/builder/pyinstaller_build_windows_gui.py
@@ -42,6 +42,6 @@
         "--onefile",
         "--version-file={}".format("version_info.txt"),
         "--windowed",
-        str(package_folder / "dicogis.py"),
+        str(package_folder.joinpath("ui/main.py")),
     ]
 )
diff --git a/dicogis/cli/main.py b/dicogis/cli/main.py
index 6701f1f6..9de12ca6 100644
--- a/dicogis/cli/main.py
+++ b/dicogis/cli/main.py
@@ -19,7 +19,7 @@
 # ########## Globals ###############
 # ##################################
 
-cli_dicogis = typer.Typer()
+dicogis_cli = typer.Typer()
 state = {"verbose": False}
 APP_NAME = __title__
 logger = logging.getLogger(__name__)
@@ -43,7 +43,7 @@ def version_callback(value: bool):
         raise typer.Exit()
 
 
-@cli_dicogis.callback()
+@dicogis_cli.callback()
 def main(
     verbose: Annotated[
         bool,
@@ -76,7 +76,7 @@ def main(
 
 
 # integrate subcommands
-cli_dicogis.add_typer(cli_list, name="list")
+dicogis_cli.add_typer(cli_list, name="list")
 
 
 # ############################################################################
@@ -84,4 +84,4 @@ def main(
 # #################################
 if __name__ == "__main__":
     """standalone execution"""
-    cli_dicogis()
+    dicogis_cli()
diff --git a/dicogis/ui/main.py b/dicogis/ui/main.py
new file mode 100644
index 00000000..97dfddf9
--- /dev/null
+++ b/dicogis/ui/main.py
@@ -0,0 +1,108 @@
+#! python3  # noqa: E265
+
+
+"""
+    DicoGIS
+    Automatize the creation of a dictionnary of geographic data
+                contained in a folders structures.
+                It produces an Excel output file (.xlsx)
+
+    Julien Moura (@geojulien)
+"""
+
+# ##############################################################################
+# ########## Libraries #############
+# ##################################
+
+# standard library
+import logging
+import sys
+from logging.handlers import RotatingFileHandler
+from os import getenv
+from sys import platform as opersys
+
+# GUI
+from tkinter import TkVersion
+
+# Project
+from dicogis.ui.main_windows import DicoGIS
+
+# ##############################################################################
+# ############ Globals ############
+# #################################
+
+
+logger = logging.getLogger("DicoGIS")
+
+# ##############################################################################
+# ############ Functions ###########
+# ##################################
+
+
+def dicogis_gui():
+    """Launch DicoGIS GUI."""
+    # LOG
+    logging.captureWarnings(True)
+    logger.setLevel(logging.DEBUG)  # all errors will be get
+    log_form = logging.Formatter(
+        "%(asctime)s || %(levelname)s "
+        "|| %(module)s - %(lineno)d ||"
+        " %(funcName)s || %(message)s"
+    )
+    logfile = RotatingFileHandler("LOG_DicoGIS.log", "a", 5000000, 1)
+    logfile.setLevel(logging.DEBUG)
+    logfile.setFormatter(log_form)
+    logger.addHandler(logfile)
+
+    # 3rd party
+    # condition import
+    if opersys == "linux":
+        import distro
+
+    # check Tk version
+    logger.info(f"{TkVersion=}")
+    if TkVersion < 8.6:
+        logger.critical("DicoGIS requires Tkversion >= 8.6.")
+        sys.exit(1)
+
+    # determine theme depending on operating system and distro
+    theme = "arc"
+    if theme_from_env := getenv("DICOGIS_UI_THEME"):
+        theme = theme_from_env
+    elif opersys == "darwin":
+        theme = "breeze"
+    elif opersys == "linux":
+        theme = "radiance"
+        if distro.name().lower() == "ubuntu":
+            theme = "yaru"
+    elif opersys == "win32":
+        theme = "breeze"
+    else:
+        logger.warning(
+            f"Your platform/operating system is not recognized: {opersys}. "
+            "It may lead to some strange behavior or buggy events."
+        )
+
+    logger.info(f"Used theme: {theme}")
+
+    # launch the main UI
+    try:
+        app = DicoGIS(theme=theme)
+        app.set_theme(theme_name=theme)
+    except Exception as err:
+        logger.critical(
+            "Launching DicoGIS UI failed. Did you install the system "
+            f"requirements? Trace: {err}"
+        )
+        raise (err)
+
+    app.mainloop()
+
+
+# ############################################################################
+# #### Stand alone program ########
+# #################################
+
+if __name__ == "__main__":
+    """standalone execution"""
+    dicogis_gui()
diff --git a/dicogis/dicogis.py b/dicogis/ui/main_windows.py
similarity index 100%
rename from dicogis/dicogis.py
rename to dicogis/ui/main_windows.py
diff --git a/docs/development/ubuntu.md b/docs/development/ubuntu.md
index 5718fb07..35ee3e96 100644
--- a/docs/development/ubuntu.md
+++ b/docs/development/ubuntu.md
@@ -134,7 +134,9 @@ dicogis-cli --help
 GUI:
 
 ```sh
-python dicogis/dicogis.py
+dicogis-gui
+# or
+python dicogis/ui/main.py
 ```
 
 ## Install git hooks
diff --git a/docs/development/windows.md b/docs/development/windows.md
index 10322dec..a50adee2 100644
--- a/docs/development/windows.md
+++ b/docs/development/windows.md
@@ -70,7 +70,9 @@ dicogis-cli --help
 GUI:
 
 ```sh
-python dicogis/dicogis.py
+dicogis-gui
+# or
+python dicogis/ui/main.py
 ```
 
 ## Install git hooks
diff --git a/setup.py b/setup.py
index 6d62b4c7..9ae5d215 100644
--- a/setup.py
+++ b/setup.py
@@ -80,7 +80,7 @@ def load_requirements(requirements_files: Path | list[Path]) -> list:
     ),
     include_package_data=True,
     # dependencies
-    python_requires=">=3.9, <4",
+    python_requires=">=3.10, <4",
     extras_require={
         "dev": load_requirements(HERE / "requirements/development.txt"),
         "doc": load_requirements(HERE / "requirements/documentation.txt"),
@@ -91,10 +91,10 @@ def load_requirements(requirements_files: Path | list[Path]) -> list:
     # run
     entry_points={
         "console_scripts": [
-            f"{__about__.__package_name__}-cli = dicogis.cli.main:cli_dicogis"
+            f"{__about__.__package_name__}-cli = dicogis.cli.main:dicogis_cli"
         ],
         "gui_scripts": [
-            "dicogis = dicogis.DicoGIS:__main__",
+            f"{__about__.__package_name__}-gui = dicogis.ui.main:dicogis_gui",
         ],
     },
     # metadata
@@ -103,15 +103,16 @@ def load_requirements(requirements_files: Path | list[Path]) -> list:
         "Intended Audience :: End Users/Desktop",
         "Intended Audience :: Information Technology",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: Implementation :: CPython",
         "Development Status :: 5 - Production/Stable",
         "Environment :: Win32 (MS Windows)",
         "License :: OSI Approved :: Apache Software License 2.0",
         "Operating System :: OS Independent",
         "Operating System :: Microsoft :: Windows :: Windows 10",
+        "Operating System :: Microsoft :: Windows :: Windows 11",
         "Topic :: Scientific/Engineering :: GIS",
     ],
 )