diff --git a/python/online/fxreader/pr34/commands_typed/cli_bootstrap.py b/python/online/fxreader/pr34/commands_typed/cli_bootstrap.py
index 44304ef..0fd3b20 100644
--- a/python/online/fxreader/pr34/commands_typed/cli_bootstrap.py
+++ b/python/online/fxreader/pr34/commands_typed/cli_bootstrap.py
@@ -101,6 +101,43 @@ def check_dict(
             value,
         )
 
+@overload
+def check_list(
+    value: Any,
+    VT: Type[Value],
+) -> list[Value]: ...
+
+@overload
+def check_list(
+    value: Any,
+) -> list[Any]: ...
+
+def check_list(
+    value: Any,
+    VT: Optional[Type[Value]] = None,
+) -> list[Value] | list[Any]:
+    assert isinstance(value, list)
+    value2 = cast(list[Any], value)
+
+    assert all([
+        (
+            VT is None or
+            isinstance(o, VT)
+        )
+        for o in value2
+    ])
+
+    if VT is None:
+        return cast(
+            list[Any],
+            value,
+        )
+    else:
+        return cast(
+            list[Value],
+            value,
+        )
+
 def pyproject_load(
     d: pathlib.Path,
 ) -> PyProject:
@@ -148,18 +185,11 @@ def pyproject_load(
     tool_name = 'online.fxreader.pr34'.replace('.', '-')
 
     if (
-        'tool' in content and
-        isinstance(
-            content['tool'], dict
-        ) and
-        all([
-            isinstance(o, str)
-            for o in content['tool']
-        ])
+        'tool' in content
     ):
-        res.tool = cast(
-            dict[str, Any],
-            content['tool']
+        res.tool = check_dict(
+            content['tool'],
+            str,
         )
 
     if (
@@ -173,42 +203,52 @@ def pyproject_load(
             dict
         )
     ):
-        if 'early_features' in content['tool'][tool_name]:
-            res.early_features = content['tool'][tool_name]['early_features']
+        pr34_tool = check_dict(
+            check_dict(
+                content['tool'],
+                str,
+            )[tool_name],
+            str
+        )
 
-        if 'pip_find_links' in content['tool'][tool_name]:
+        if 'early_features' in pr34_tool:
+            res.early_features = pr34_tool['early_features']
+
+        if 'pip_find_links' in pr34_tool:
             res.pip_find_links = [
                 d.parent / pathlib.Path(o)
-                for o in content['tool'][tool_name]['pip_find_links']
+                for o in pr34_tool['pip_find_links']
             ]
 
-        if 'runtime_libdirs' in content['tool'][tool_name]:
+        if 'runtime_libdirs' in pr34_tool:
             res.runtime_libdirs = [
                 d.parent / pathlib.Path(o)
                 # pathlib.Path(o)
-                for o in content['tool'][tool_name]['runtime_libdirs']
+                for o in pr34_tool['runtime_libdirs']
             ]
 
-        if 'runtime_preload' in content['tool'][tool_name]:
+        if 'runtime_preload' in pr34_tool:
             res.runtime_preload = [
                 d.parent / pathlib.Path(o)
                 # pathlib.Path(o)
-                for o in content['tool'][tool_name]['runtime_preload']
+                for o in pr34_tool['runtime_preload']
             ]
 
-        if 'requirements' in content['tool'][tool_name]:
-            assert isinstance(content['tool'][tool_name]['requirements'], dict)
-
+        if 'requirements' in pr34_tool:
             res.requirements = {
                 k : d.parent / pathlib.Path(v)
                 # pathlib.Path(o)
-                for k, v in content['tool'][tool_name]['requirements'].items()
+                for k, v in check_dict(
+                    pr34_tool['requirements'],
+                    str,
+                    str
+                ).items()
             }
 
-        if 'modules' in content['tool'][tool_name]:
-            modules = content['tool'][tool_name]['modules']
-            assert isinstance(modules, list)
-
+        if 'modules' in pr34_tool:
+            modules = check_list(
+                pr34_tool['modules']
+            )
             # res.modules = []
 
             for o in modules: