diff --git a/ryven-editor/ryven/main/Ryven.py b/ryven-editor/ryven/main/Ryven.py
index da0c9c8a..aa68cb3c 100644
--- a/ryven-editor/ryven/main/Ryven.py
+++ b/ryven-editor/ryven/main/Ryven.py
@@ -63,10 +63,7 @@ def run(*args_,
     -------
     None|Main Window
     """
-
-    from ryven.node_env import init_node_env
-    from ryven.gui_env import init_node_guis_env    # Qt dependency
-
+                
     # Process command line and method's arguments
     conf: Config = process_args(use_sysargs, *args_, **kwargs)
 
@@ -74,11 +71,11 @@ def run(*args_,
     # Qt application setup
     #
 
-    # QtPy API
-    os.environ['QT_API'] = conf.qt_api
-
     # Init environment
     os.environ['RYVEN_MODE'] = 'gui'
+    os.environ['QT_API'] = conf.qt_api
+    from ryven.node_env import init_node_env
+    from ryven.gui_env import init_node_guis_env  # Qt dependency
     init_node_env()
     init_node_guis_env()
 
diff --git a/ryven-editor/ryven/main/args_parser.py b/ryven-editor/ryven/main/args_parser.py
index 7ba5861a..3ec94d6c 100644
--- a/ryven-editor/ryven/main/args_parser.py
+++ b/ryven-editor/ryven/main/args_parser.py
@@ -236,7 +236,7 @@ def parse_sys_args(just_defaults=False) -> Config:
     # Display
 
     group = parser.add_argument_group('display')
-
+    
     group.add_argument(
         '-w', '--window-theme',
         choices=Config.get_available_window_themes(),
diff --git a/ryven-editor/ryven/main/config.py b/ryven-editor/ryven/main/config.py
index 77d978ce..6e415d7e 100644
--- a/ryven-editor/ryven/main/config.py
+++ b/ryven-editor/ryven/main/config.py
@@ -1,4 +1,5 @@
 import pathlib
+import os
 from typing import Optional, Literal, List, Dict, Set, Union
 
 from ryven import NodesPackage
@@ -45,9 +46,12 @@ def get_available_window_themes() -> Set[str]:
 
     @staticmethod
     def get_available_flow_themes() -> Set[str]:
-        # FIXME: this is not stable api; expose it properly in ryvencore-qt
-        from ryvencore_qt.src.Design import Design
-        return {t.name for t in Design().flow_themes}
+        # TODO: expose this in ryvencore_qt without requiring Qt import, since QT_API is not set yet
+        return {
+            "Toy", "Tron", "Ghost", "Blender", "Simple",
+            "Ueli", "pure dark", "colorful dark", "pure light",
+            "colorful light", "Industrial", "Fusion"
+        }
 
     @staticmethod
     def get_available_performance_modes() -> Set[str]:
diff --git a/ryven-editor/setup.cfg b/ryven-editor/setup.cfg
index 377b6abb..e24dc0bd 100644
--- a/ryven-editor/setup.cfg
+++ b/ryven-editor/setup.cfg
@@ -19,7 +19,7 @@ classifiers =
 [options]
 packages = find:
 include_package_data = True
-python_requires = >=3.6, <=3.10
+python_requires = >=3.6, <3.11
 install_requires =
     ryvencore-qt ==0.4.*
     ryvencore ==0.4.*