diff --git a/.checkignore b/.checkignore
deleted file mode 100644
index d827e8d..0000000
--- a/.checkignore
+++ /dev/null
@@ -1,2 +0,0 @@
-docs/*
-pylottosimu/dialog/UI_lottosystem.py
diff --git a/docs/conf.py b/docs/conf.py
index 60eaed8..a7d83d8 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -28,7 +28,7 @@ class Mock(MagicMock):
     def __getattr__(cls, name):
             return Mock()
 
-MOCK_MODULES = ['PyQt6', 'PyQt6.QtSvg']
+MOCK_MODULES = ['PyQt5', 'PyQt5.QtSvg']
 sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
 
 # If extensions (or modules to document with autodoc) are in another directory,
@@ -66,7 +66,7 @@ def __getattr__(cls, name):
 
 # General information about the project.
 project = 'pyLottoSimu'
-copyright = '2015-2018, pyLottoSimu-Team'
+copyright = '2015-2024, pyLottoSimu-Team'
 author = 'Markus Hackspacher'
 
 # The version info for the project you're documenting, acts as replacement for
diff --git a/requirements.txt b/requirements.txt
index 0758dd7..348c98c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-PyQt6
+PyQt5
 # unit test requirements
 mock
 pycodestyle