diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8735f08..5f1d7f0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.11"]
+        python-version: ["3.9", "3.11"]
         runs-on: [ubuntu-latest, macos-13, windows-latest]
         include:
         - python-version: "3.13"
diff --git a/pyproject.toml b/pyproject.toml
index cb5e637..98026e9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,12 +10,11 @@ authors = [
 maintainers = [
   { name = "The Scikit-HEP admins", email = "scikit-hep-admins@googlegroups.com" },
 ]
-license = { file = "LICENSE" }
 
 description = "Tools to inspect ROOT files with uproot"
 readme = "README.md"
 
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 
 classifiers = [
   "License :: OSI Approved :: BSD License",
@@ -26,7 +25,6 @@ classifiers = [
   "License :: OSI Approved :: BSD License",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3",
-  "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
@@ -38,16 +36,15 @@ classifiers = [
 
 dynamic = ["version"]
 dependencies = [
-  'awkward >=1',
+  'awkward >=2',
   'click >=8',
   'click-default-group >=1.2',
   'hist >=2.4',
-  'importlib_resources; python_version<"3.9"',
   'lz4>=2',
-  'numpy >=1.13.3',
+  'numpy >=1.18',
   'plotext >=5.2.8',
   'rich >=13.3.3',
-  'textual >=0.18.0',
+  'textual >=0.86.0',
   'uproot >=5',
 ]
 
@@ -81,20 +78,13 @@ dev = [
 version.source = "vcs"
 build.hooks.vcs.version-file = "src/uproot_browser/_version.py"
 
-[tool.uv]
-environments = [
-  "python_version >= '3.11'",
-]
-
 [tool.pytest.ini_options]
-minversion = "6.0"
+minversion = "8.0"
 addopts = ["-ra", "--showlocals", "--strict-markers", "--strict-config"]
 xfail_strict = true
 filterwarnings = [
   "error",
   "ignore:can't resolve package from __spec__ or __package__, falling back on __name__ and __path__:ImportWarning",  # PyPy NumPy
-  "ignore:module 'sre_.*' is deprecated:DeprecationWarning:awkward",  # Awkward 1
-  "ignore: pkg_resources is deprecated as an API:DeprecationWarning:uproot",  # Uproot 4
 ]
 log_cli_level = "info"
 testpaths = ["tests"]
@@ -104,7 +94,7 @@ asyncio_default_fixture_loop_scope = "function"
 
 [tool.mypy]
 files = "src"
-python_version = "3.8"
+python_version = "3.9"
 warn_unused_configs = true
 strict = true
 
@@ -114,7 +104,7 @@ ignore_missing_imports = true
 
 
 [tool.pylint]
-master.py-version = "3.8"
+master.py-version = "3.9"
 master.jobs = "0"
 reports.output-format = "colorized"
 similarities.ignore-imports = "yes"
diff --git a/src/uproot_browser/_compat/__init__.py b/src/uproot_browser/_compat/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/src/uproot_browser/_compat/importlib/__init__.py b/src/uproot_browser/_compat/importlib/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/src/uproot_browser/_compat/importlib/resources.py b/src/uproot_browser/_compat/importlib/resources.py
deleted file mode 100644
index 37bf326..0000000
--- a/src/uproot_browser/_compat/importlib/resources.py
+++ /dev/null
@@ -1,10 +0,0 @@
-from __future__ import annotations
-
-import sys
-
-if sys.version_info < (3, 9):
-    from importlib_resources import files
-else:
-    from importlib.resources import files
-
-__all__ = ["files"]
diff --git a/src/uproot_browser/plot_mpl.py b/src/uproot_browser/plot_mpl.py
index 4087822..b7fc232 100644
--- a/src/uproot_browser/plot_mpl.py
+++ b/src/uproot_browser/plot_mpl.py
@@ -11,6 +11,7 @@
 import hist
 import matplotlib.pyplot as plt
 import uproot
+import uproot.behaviors.TH1
 
 import uproot_browser.plot
 
diff --git a/src/uproot_browser/tui/browser.py b/src/uproot_browser/tui/browser.py
index 2faf7a1..27500d3 100644
--- a/src/uproot_browser/tui/browser.py
+++ b/src/uproot_browser/tui/browser.py
@@ -122,7 +122,7 @@ def action_quit_with_dump(self) -> None:
             assert err_widget.exc
             items = [err_widget.exc]
 
-        dark = self.dark if hasattr(self, "dark") else self.theme != "textual-light"  # type: ignore[has-type]
+        dark = self.theme != "textual-light"
 
         theme = "ansi_dark" if dark else "ansi_light"
 
@@ -135,20 +135,12 @@ def action_quit_with_dump(self) -> None:
 
     def action_toggle_theme(self) -> None:
         """An action to toggle dark mode."""
-        if hasattr(self, "dark"):
-            # pylint: disable-next=access-member-before-definition
-            dark = not self.dark  # type: ignore[has-type]
-            if self.plot_widget.item:
-                self.plot_widget.item.theme = "dark" if dark else "default"
-            # pylint: disable-next=attribute-defined-outside-init
-            self.dark = dark
-        else:
-            dark = self.theme != "textual-light"
-            theme = "textual-light" if dark else "textual-dark"
+        dark = self.theme != "textual-light"
+        theme = "textual-light" if dark else "textual-dark"
 
-            if self.plot_widget.item:
-                self.plot_widget.item.theme = "dark" if dark else "default"
-            self.theme = theme
+        if self.plot_widget.item:
+            self.plot_widget.item.theme = "dark" if dark else "default"
+        self.theme = theme
 
     def on_uproot_selected(self, message: UprootSelected) -> None:
         """A message sent by the tree when a file is clicked."""
@@ -156,7 +148,7 @@ def on_uproot_selected(self, message: UprootSelected) -> None:
         content_switcher = self.query_one("#main-view", textual.widgets.ContentSwitcher)
 
         try:
-            dark = self.dark if hasattr(self, "dark") else self.theme != "textual-light"
+            dark = self.theme != "textual-light"
             theme = "dark" if dark else "default"
             make_plot(message.upfile[message.path], theme, 20)
             self.plot_widget.item = Plotext(message.upfile, message.path, theme)
diff --git a/src/uproot_browser/tui/help.py b/src/uproot_browser/tui/help.py
index 1f970c0..5c5a875 100644
--- a/src/uproot_browser/tui/help.py
+++ b/src/uproot_browser/tui/help.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import typing
+from importlib.resources import files
 from typing import ClassVar
 
 import textual.app
@@ -12,15 +13,8 @@
 if typing.TYPE_CHECKING:
     from .browser import Browser
 
-    # 0.18's ModalScreen is not subscriptable. Later versions are.
-    ModalScreen = textual.screen.ModalScreen[None]
-else:
-    ModalScreen = textual.screen.ModalScreen
 
-from .._compat.importlib.resources import files
-
-
-class HelpScreen(ModalScreen):
+class HelpScreen(textual.screen.ModalScreen[None]):
     BINDINGS: ClassVar[
         list[textual.binding.Binding | tuple[str, str] | tuple[str, str, str]]
     ] = [