diff --git a/.github/workflows/test_linux.yml b/.github/workflows/test_linux.yml
index 83db7924..4c967dba 100644
--- a/.github/workflows/test_linux.yml
+++ b/.github/workflows/test_linux.yml
@@ -14,7 +14,7 @@ jobs:
   testLinux:
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
       fail-fast: false
     runs-on: ubuntu-latest
     steps:
diff --git a/README.md b/README.md
index 5e690554..3ac3c385 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ documentation.
 
 ## Implementation
 
-novelWriter is written with Python 3 (3.9+) using Qt5 and PyQt5 (5.15 only), and is released on
+novelWriter is written with Python 3 (3.10+) using Qt5 and PyQt5 (5.15 only), and is released on
 Linux, Windows and macOS. It can in principle run on any Operating System that also supports Qt,
 PyQt and Python.
 
diff --git a/novelwriter/__init__.py b/novelwriter/__init__.py
index 3eaf6cdd..7e9f74f1 100644
--- a/novelwriter/__init__.py
+++ b/novelwriter/__init__.py
@@ -201,9 +201,9 @@ def main(sysArgs: list | None = None) -> GuiMain | None:
     # Check Packages and Versions
     errorData = []
     errorCode = 0
-    if sys.hexversion < 0x030900f0:
+    if sys.hexversion < 0x030a00f0:
         errorData.append(
-            "At least Python 3.9 is required, found %s" % CONFIG.verPyString
+            "At least Python 3.10 is required, found %s" % CONFIG.verPyString
         )
         errorCode |= 0x04
     if CONFIG.verQtValue < 0x050f00:
diff --git a/novelwriter/common.py b/novelwriter/common.py
index 317aced5..17a465ee 100644
--- a/novelwriter/common.py
+++ b/novelwriter/common.py
@@ -33,7 +33,7 @@ from collections.abc import Callable
 from configparser import ConfigParser
 from datetime import datetime
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Literal, TypeVar
+from typing import Any, Literal, TypeGuard, TypeVar
 from urllib.parse import urljoin
 from urllib.request import pathname2url
 
@@ -44,9 +44,6 @@ from novelwriter.constants import nwConst, nwLabels, nwUnicode, trConst
 from novelwriter.enum import nwItemClass, nwItemLayout, nwItemType
 from novelwriter.error import logException
 
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import TypeGuard  # Requires Python 3.10
-
 logger = logging.getLogger(__name__)
 
 _Type = TypeVar("_Type")
diff --git a/novelwriter/core/itemmodel.py b/novelwriter/core/itemmodel.py
index 9cd82c39..8910e2b4 100644
--- a/novelwriter/core/itemmodel.py
+++ b/novelwriter/core/itemmodel.py
@@ -60,9 +60,7 @@ NODE_FLAGS = Qt.ItemFlag.ItemIsEnabled
 NODE_FLAGS |= Qt.ItemFlag.ItemIsSelectable
 NODE_FLAGS |= Qt.ItemFlag.ItemIsDropEnabled
 
-if TYPE_CHECKING:  # pragma: no cover
-    # Requires Python 3.10
-    T_NodeData = str | QIcon | QFont | Qt.AlignmentFlag | None
+T_NodeData = str | QIcon | QFont | Qt.AlignmentFlag | None
 
 
 class ProjectNode:
diff --git a/novelwriter/core/project.py b/novelwriter/core/project.py
index e568e1cc..50bf4a94 100644
--- a/novelwriter/core/project.py
+++ b/novelwriter/core/project.py
@@ -30,7 +30,6 @@ from enum import Enum
 from functools import partial
 from pathlib import Path
 from time import time
-from typing import TYPE_CHECKING
 
 from PyQt5.QtCore import QCoreApplication
 
@@ -45,15 +44,12 @@ from novelwriter.core.options import OptionState
 from novelwriter.core.projectdata import NWProjectData
 from novelwriter.core.projectxml import ProjectXMLReader, ProjectXMLWriter, XMLReadState
 from novelwriter.core.sessions import NWSessionLog
+from novelwriter.core.status import T_StatusKind, T_UpdateEntry
 from novelwriter.core.storage import NWStorage, NWStorageOpen
 from novelwriter.core.tree import NWTree
 from novelwriter.enum import nwItemClass, nwItemLayout, nwItemType
 from novelwriter.error import logException
 
-if TYPE_CHECKING:  # pragma: no cover
-    # Requires Python 3.10
-    from novelwriter.core.status import T_StatusKind, T_UpdateEntry
-
 logger = logging.getLogger(__name__)
 
 
diff --git a/novelwriter/core/status.py b/novelwriter/core/status.py
index f8569532..24b57aa6 100644
--- a/novelwriter/core/status.py
+++ b/novelwriter/core/status.py
@@ -29,7 +29,7 @@ import logging
 import random
 
 from collections.abc import Iterable
-from typing import TYPE_CHECKING, Literal
+from typing import Literal, TypeGuard
 
 from PyQt5.QtCore import QPointF, Qt
 from PyQt5.QtGui import QColor, QIcon, QPainter, QPainterPath, QPixmap, QPolygonF
@@ -39,9 +39,6 @@ from novelwriter.common import simplified
 from novelwriter.enum import nwStatusShape
 from novelwriter.types import QtPaintAntiAlias, QtTransparent
 
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import TypeGuard  # Requires Python 3.10
-
 logger = logging.getLogger(__name__)
 
 
@@ -65,10 +62,8 @@ class StatusEntry:
 
 NO_ENTRY = StatusEntry("", QColor(0, 0, 0), nwStatusShape.SQUARE, QIcon(), 0)
 
-if TYPE_CHECKING:  # pragma: no cover
-    # Requires Python 3.10
-    T_UpdateEntry = list[tuple[str | None, StatusEntry]]
-    T_StatusKind = Literal["s", "i"]
+T_UpdateEntry = list[tuple[str | None, StatusEntry]]
+T_StatusKind = Literal["s", "i"]
 
 
 class NWStatus:
diff --git a/pyproject.toml b/pyproject.toml
index 08f4d999..79ecd45b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,6 @@ readme = {file = "setup/description_pypi.md", content-type = "text/markdown"}
 license = {text = "GNU General Public License v3"}
 classifiers = [
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -25,7 +24,7 @@ classifiers = [
     "Natural Language :: English",
     "Topic :: Text Editors",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "pyqt5>=5.15",
     "pyenchant>=3.0.0",
diff --git a/setup/debian/control b/setup/debian/control
index 6e5504a2..9f9e5756 100644
--- a/setup/debian/control
+++ b/setup/debian/control
@@ -2,14 +2,14 @@ Source: novelwriter
 Maintainer: Veronica Berglyd Olsen <code@vkbo.net>
 Section: text
 Priority: optional
-Build-Depends: dh-python, python3-setuptools, python3-all, debhelper (>= 9), python3 (>=3.9), python3-pyqt5 (>= 5.15), python3-enchant (>= 2.0)
+Build-Depends: dh-python, python3-setuptools, python3-all, debhelper (>= 9), python3 (>=3.10), python3-pyqt5 (>= 5.15), python3-enchant (>= 2.0)
 Standards-Version: 4.5.1
 Homepage: https://novelwriter.io
-X-Python3-Version: >= 3.9
+X-Python3-Version: >= 3.10
 
 Package: novelwriter
 Architecture: all
-Depends: ${misc:Depends}, ${python3:Depends}, python3 (>=3.9), python3-pyqt5 (>= 5.15), python3-enchant (>= 2.0)
+Depends: ${misc:Depends}, ${python3:Depends}, python3 (>=3.10), python3-pyqt5 (>= 5.15), python3-enchant (>= 2.0)
 Description: A markdown-like text editor for planning and writing novels
  novelWriter is a plain text editor designed for writing novels assembled from
  many smaller text documents. It uses a minimal formatting syntax inspired by
diff --git a/setup/description_pypi.md b/setup/description_pypi.md
index a774e10b..336a2e1c 100644
--- a/setup/description_pypi.md
+++ b/setup/description_pypi.md
@@ -10,7 +10,7 @@ synchronisation tools. All text is saved as plain text files with a meta data he
 project structure is stored in a single project XML file, and other meta data is primarily saved as
 JSON files.
 
-The application is written with Python 3 (3.9+) using Qt5 and PyQt5 (5.10+). It is developed on
+The application is written with Python 3 (3.10+) using Qt5 and PyQt5 (5.10+). It is developed on
 Linux, but should in principle work fine on other operating systems as well as long as dependencies
 are met. It is regularly tested on Debian and Ubuntu Linux, Windows, and MacOS.
 
diff --git a/setup/launchpad_setup.cfg b/setup/launchpad_setup.cfg
index e2dcb12c..74b3360d 100644
--- a/setup/launchpad_setup.cfg
+++ b/setup/launchpad_setup.cfg
@@ -11,7 +11,6 @@ license_files = LICENSE.md
 license = GNU General Public License v3
 classifiers =
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
@@ -30,7 +29,7 @@ project_urls =
 
 [options]
 zip_safe = False
-python_requires = >=3.9
+python_requires = >=3.10
 include_package_data = True
 packages = find_namespace:
 install_requires =