diff --git a/environment.yml b/environment.yml
index e769a84f..d266b888 100644
--- a/environment.yml
+++ b/environment.yml
@@ -19,8 +19,7 @@ dependencies:
   - pydata-sphinx-theme
   - lmfit # needed into TRR
   - h5py # needed into TRR (should be removed to use I/O methods of containers)
-  - pyqt # [linux]
-  - pyside6 # [osx and arm64]
+  - pyqt
   - pyqtgraph
   - pip:
     - zeo
diff --git a/pyproject.toml b/pyproject.toml
index 4e3124e4..24d4682e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,8 +29,8 @@ dependencies = [
     "zeo",
     "lmfit",
     "h5py",
-    'pyqt5 ; platform_system == "Linux"',
-    'pyqt6 ; platform_system != "Linux"',  # for macOS
+    'pyqt5',
+    # 'pyqt6 ; platform_system != "Linux"',  # for macOS
     "pyqtgraph",
 ]
 
diff --git a/src/nectarchain/trr_test_suite/gui.py b/src/nectarchain/trr_test_suite/gui.py
index 36789451..1dea5516 100644
--- a/src/nectarchain/trr_test_suite/gui.py
+++ b/src/nectarchain/trr_test_suite/gui.py
@@ -4,49 +4,26 @@
 import sys
 import tempfile
 
+from matplotlib.backends.backend_qt5 import NavigationToolbar2QT as NavigationToolbar
 from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
 from matplotlib.figure import Figure
-
-try:
-    from matplotlib.backends.backend_qt import NavigationToolbar2QT as NavigationToolbar
-    from PyQt6.QtCore import QProcess, QTimer
-    from PyQt6.QtWidgets import (
-        QApplication,
-        QComboBox,
-        QGroupBox,
-        QHBoxLayout,
-        QLabel,
-        QLineEdit,
-        QMessageBox,
-        QPushButton,
-        QSizePolicy,
-        QSpacerItem,
-        QTextEdit,
-        QVBoxLayout,
-        QWidget,
-        QWidgetItem,
-    )
-except ImportError:
-    from PyQt5.QtCore import QProcess, QTimer
-    from PyQt5.QtWidgets import (
-        QApplication,
-        QComboBox,
-        QGroupBox,
-        QHBoxLayout,
-        QLabel,
-        QLineEdit,
-        QMessageBox,
-        QPushButton,
-        QSizePolicy,
-        QSpacerItem,
-        QTextEdit,
-        QVBoxLayout,
-        QWidget,
-        QWidgetItem,
-    )
-    from matplotlib.backends.backend_qt5 import (
-        NavigationToolbar2QT as NavigationToolbar,
-    )
+from PyQt5.QtCore import QProcess, QTimer
+from PyQt5.QtWidgets import (
+    QApplication,
+    QComboBox,
+    QGroupBox,
+    QHBoxLayout,
+    QLabel,
+    QLineEdit,
+    QMessageBox,
+    QPushButton,
+    QSizePolicy,
+    QSpacerItem,
+    QTextEdit,
+    QVBoxLayout,
+    QWidget,
+    QWidgetItem,
+)
 
 import nectarchain.trr_test_suite.deadtime as deadtime
 import nectarchain.trr_test_suite.linearity as linearity