diff --git a/python/online/fxreader/pr34/commands_typed/cli.py b/python/online/fxreader/pr34/commands_typed/cli.py
index ad62dce..c3119a9 100644
--- a/python/online/fxreader/pr34/commands_typed/cli.py
+++ b/python/online/fxreader/pr34/commands_typed/cli.py
@@ -20,6 +20,10 @@ from typing import (
     MutableMapping,
 )
 
+from typing_extensions import (
+    cast,
+)
+
 logger = logging.getLogger(__name__)
 
 @dataclasses.dataclass
@@ -158,7 +162,7 @@ class CLI(abc.ABC):
         dependencies = sum([
             pyproject.dependencies[o]
             for o in features
-        ], [])
+        ], cast(list[str], []))
 
         pip_find_links : list[pathlib.Path] = []
 
@@ -178,7 +182,7 @@ class CLI(abc.ABC):
                 *sum([
                     ['-f', str(o),]
                     for o in pip_find_links
-                ], []),
+                ], cast(list[str], [])),
                 # '-f', str(pathlib.Path(__file__).parent / 'deps' / 'dist'),
                 '--offline',
                 *dependencies,
@@ -599,7 +603,7 @@ class CLI(abc.ABC):
         dependencies = sum([
             pyproject.dependencies[o]
             for o in options.features
-        ], [])
+        ], cast(list[str], []))
 
         pip_find_links : list[pathlib.Path] = []
 
@@ -641,7 +645,7 @@ class CLI(abc.ABC):
                 *sum([
                     ['-f', str(o),]
                     for o in pip_find_links
-                ], []),
+                ], cast(list[str], [])),
                 '--generate-hashes',
                 str(requirements_name_get_res.not_compiled),
                 '-o',