diff --git a/docs/source/spelling_wordlist.txt b/docs/source/spelling_wordlist.txt
index bdacf22a..3ed46647 100644
--- a/docs/source/spelling_wordlist.txt
+++ b/docs/source/spelling_wordlist.txt
@@ -160,3 +160,4 @@ maxsize
 reentrant
 env
 tty
+CPython
diff --git a/nvitop/cli.py b/nvitop/cli.py
index 6ab7d978..0e8f11cd 100644
--- a/nvitop/cli.py
+++ b/nvitop/cli.py
@@ -4,13 +4,12 @@
 """The interactive NVIDIA-GPU process viewer."""
 
 import argparse
-import curses
 import os
 import sys
 import textwrap
 
 from nvitop.api import HostProcess, libnvml
-from nvitop.tui import TUI, USERNAME, Device, colored, libcurses, set_color, setlocale_utf8
+from nvitop.tui import TUI, USERNAME, Device, colored, curses, libcurses, set_color, setlocale_utf8
 from nvitop.version import __version__
 
 
diff --git a/nvitop/tui/__init__.py b/nvitop/tui/__init__.py
index 173c38d1..0ec63888 100644
--- a/nvitop/tui/__init__.py
+++ b/nvitop/tui/__init__.py
@@ -8,6 +8,7 @@
     USERNAME,
     Device,
     colored,
+    curses,
     libcurses,
     set_color,
     setlocale_utf8,
diff --git a/nvitop/tui/library/curses/__init__.py b/nvitop/tui/library/curses/__init__.py
new file mode 100644
index 00000000..1244b15e
--- /dev/null
+++ b/nvitop/tui/library/curses/__init__.py
@@ -0,0 +1,8 @@
+# This file is part of nvitop, the interactive NVIDIA-GPU process viewer.
+# License: GNU GPL version 3.
+
+# pylint: disable=missing-module-docstring
+
+from curses import *  # noqa: F403 # pylint: disable=redefined-builtin
+
+from nvitop.tui.library.curses import ascii  # pylint: disable=redefined-builtin
diff --git a/nvitop/tui/library/curses/ascii.py b/nvitop/tui/library/curses/ascii.py
new file mode 100644
index 00000000..01375840
--- /dev/null
+++ b/nvitop/tui/library/curses/ascii.py
@@ -0,0 +1,213 @@
+"""Constants and membership tests for ASCII characters"""
+
+# Copied from the CPython repository.
+# https://github.com/python/cpython/blob/HEAD/Lib/curses/ascii.py
+
+# pylint: disable=missing-function-docstring
+
+from __future__ import annotations
+
+from typing import overload
+
+
+NUL = 0x00  # ^@
+SOH = 0x01  # ^A
+STX = 0x02  # ^B
+ETX = 0x03  # ^C
+EOT = 0x04  # ^D
+ENQ = 0x05  # ^E
+ACK = 0x06  # ^F
+BEL = 0x07  # ^G
+BS = 0x08  # ^H
+TAB = 0x09  # ^I
+HT = 0x09  # ^I
+LF = 0x0A  # ^J
+NL = 0x0A  # ^J
+VT = 0x0B  # ^K
+FF = 0x0C  # ^L
+CR = 0x0D  # ^M
+SO = 0x0E  # ^N
+SI = 0x0F  # ^O
+DLE = 0x10  # ^P
+DC1 = 0x11  # ^Q
+DC2 = 0x12  # ^R
+DC3 = 0x13  # ^S
+DC4 = 0x14  # ^T
+NAK = 0x15  # ^U
+SYN = 0x16  # ^V
+ETB = 0x17  # ^W
+CAN = 0x18  # ^X
+EM = 0x19  # ^Y
+SUB = 0x1A  # ^Z
+ESC = 0x1B  # ^[
+FS = 0x1C  # ^\
+GS = 0x1D  # ^]
+RS = 0x1E  # ^^
+US = 0x1F  # ^_
+SP = 0x20  # space
+DEL = 0x7F  # delete
+
+controlnames = [
+    'NUL',
+    'SOH',
+    'STX',
+    'ETX',
+    'EOT',
+    'ENQ',
+    'ACK',
+    'BEL',
+    'BS',
+    'HT',
+    'LF',
+    'VT',
+    'FF',
+    'CR',
+    'SO',
+    'SI',
+    'DLE',
+    'DC1',
+    'DC2',
+    'DC3',
+    'DC4',
+    'NAK',
+    'SYN',
+    'ETB',
+    'CAN',
+    'EM',
+    'SUB',
+    'ESC',
+    'FS',
+    'GS',
+    'RS',
+    'US',
+    'SP',
+]
+
+
+def _ctoi(c: int | str) -> int:
+    if isinstance(c, str):
+        return ord(c)
+    return c
+
+
+def isalnum(c: int | str) -> bool:
+    return isalpha(c) or isdigit(c)
+
+
+def isalpha(c: int | str) -> bool:
+    return isupper(c) or islower(c)
+
+
+def isascii(c: int | str) -> bool:
+    return 0 <= _ctoi(c) <= 127
+
+
+def isblank(c: int | str) -> bool:
+    return _ctoi(c) in (9, 32)
+
+
+def iscntrl(c: int | str) -> bool:
+    return 0 <= _ctoi(c) <= 31 or _ctoi(c) == 127
+
+
+def isdigit(c: int | str) -> bool:
+    return 48 <= _ctoi(c) <= 57
+
+
+def isgraph(c: int | str) -> bool:
+    return 33 <= _ctoi(c) <= 126
+
+
+def islower(c: int | str) -> bool:
+    return 97 <= _ctoi(c) <= 122
+
+
+def isprint(c: int | str) -> bool:
+    return 32 <= _ctoi(c) <= 126
+
+
+def ispunct(c: int | str) -> bool:
+    return isgraph(c) and not isalnum(c)
+
+
+def isspace(c: int | str) -> bool:
+    return _ctoi(c) in (9, 10, 11, 12, 13, 32)
+
+
+def isupper(c: int | str) -> bool:
+    return 65 <= _ctoi(c) <= 90
+
+
+def isxdigit(c: int | str) -> bool:
+    return isdigit(c) or (65 <= _ctoi(c) <= 70) or (97 <= _ctoi(c) <= 102)
+
+
+def isctrl(c: int | str) -> bool:
+    return 0 <= _ctoi(c) < 32
+
+
+def ismeta(c: int | str) -> bool:
+    return _ctoi(c) > 127
+
+
+@overload
+def ascii(c: int) -> int: ...  # pylint: disable=redefined-builtin
+
+
+@overload
+def ascii(c: str) -> str: ...
+
+
+def ascii(c: int | str) -> int | str:
+    if isinstance(c, str):
+        return chr(_ctoi(c) & 0x7F)
+    return _ctoi(c) & 0x7F
+
+
+@overload
+def ctrl(c: int) -> int: ...
+
+
+@overload
+def ctrl(c: str) -> str: ...
+
+
+def ctrl(c: int | str) -> int | str:
+    if isinstance(c, str):
+        return chr(_ctoi(c) & 0x1F)
+    return _ctoi(c) & 0x1F
+
+
+@overload
+def alt(c: int) -> int: ...
+
+
+@overload
+def alt(c: str) -> str: ...
+
+
+def alt(c: int | str) -> int | str:
+    if isinstance(c, str):
+        return chr(_ctoi(c) | 0x80)
+    return _ctoi(c) | 0x80
+
+
+@overload
+def unctrl(c: int) -> int: ...
+
+
+@overload
+def unctrl(c: str) -> str: ...
+
+
+def unctrl(c: int | str) -> int | str:
+    bits = _ctoi(c)
+    if bits == 0x7F:
+        rep = '^?'
+    elif isprint(bits & 0x7F):
+        rep = chr(bits & 0x7F)
+    else:
+        rep = '^' + chr(((bits & 0x7F) | 0x20) + 0x20)
+    if bits & 0x80:
+        return '!' + rep
+    return rep
diff --git a/nvitop/tui/library/keybinding.py b/nvitop/tui/library/keybinding.py
index 9d8d3924..ba5171cb 100644
--- a/nvitop/tui/library/keybinding.py
+++ b/nvitop/tui/library/keybinding.py
@@ -5,11 +5,11 @@
 # pylint: disable=missing-module-docstring,missing-class-docstring,missing-function-docstring
 
 import copy
-import curses
-import curses.ascii
 import string
 from collections import OrderedDict
 
+from nvitop.tui.library import curses
+
 
 DIGITS = set(map(ord, string.digits))
 
diff --git a/nvitop/tui/library/libcurses.py b/nvitop/tui/library/libcurses.py
index f3fe963c..8b96faa2 100644
--- a/nvitop/tui/library/libcurses.py
+++ b/nvitop/tui/library/libcurses.py
@@ -5,11 +5,11 @@
 
 import colorsys
 import contextlib
-import curses
 import locale
 import os
 import signal
 
+from nvitop.tui.library import curses
 from nvitop.tui.library.history import GRAPH_SYMBOLS
 
 
@@ -161,15 +161,16 @@ def libcurses(colorful=False, light_theme=False):
 
     # Push a Ctrl+C (ascii value 3) to the curses getch stack
     def interrupt_handler(signalnum, frame):  # pylint: disable=unused-argument
-        curses.ungetch(3)
+        curses.ungetch(curses.ascii.ETX)
 
     # Simulate a ^C press in curses when an interrupt is caught
-    signal.signal(signal.SIGINT, interrupt_handler)
+    original_interrupt_handler = signal.signal(signal.SIGINT, interrupt_handler)
 
     try:
         yield win
     finally:
         curses.endwin()
+        signal.signal(signal.SIGINT, original_interrupt_handler)
 
 
 class CursesShortcuts:
diff --git a/nvitop/tui/library/messagebox.py b/nvitop/tui/library/messagebox.py
index a8da9557..4a2e0b78 100644
--- a/nvitop/tui/library/messagebox.py
+++ b/nvitop/tui/library/messagebox.py
@@ -4,12 +4,12 @@
 
 # pylint: disable=missing-module-docstring,missing-class-docstring,missing-function-docstring
 
-import curses
 import string
 import threading
 import time
 from functools import partial
 
+from nvitop.tui.library import curses
 from nvitop.tui.library.displayable import Displayable
 from nvitop.tui.library.keybinding import normalize_keybinding
 from nvitop.tui.library.process import host
diff --git a/nvitop/tui/library/mouse.py b/nvitop/tui/library/mouse.py
index e6d6b130..0babfefe 100644
--- a/nvitop/tui/library/mouse.py
+++ b/nvitop/tui/library/mouse.py
@@ -4,7 +4,7 @@
 
 # pylint: disable=missing-module-docstring,missing-class-docstring,missing-function-docstring
 
-import curses
+from nvitop.tui.library import curses
 
 
 class MouseEvent:
diff --git a/nvitop/tui/tui.py b/nvitop/tui/tui.py
index bce13b25..11843235 100644
--- a/nvitop/tui/tui.py
+++ b/nvitop/tui/tui.py
@@ -3,11 +3,10 @@
 
 # pylint: disable=missing-module-docstring,missing-class-docstring,missing-function-docstring
 
-import curses
 import shutil
 import time
 
-from nvitop.tui.library import ALT_KEY, DisplayableContainer, KeyBuffer, KeyMaps, MouseEvent
+from nvitop.tui.library import ALT_KEY, DisplayableContainer, KeyBuffer, KeyMaps, MouseEvent, curses
 from nvitop.tui.screens import (
     BreakLoop,
     EnvironScreen,