diff --git a/novelwriter/__init__.py b/novelwriter/__init__.py
index ae1da61d..9590241d 100644
--- a/novelwriter/__init__.py
+++ b/novelwriter/__init__.py
@@ -202,14 +202,14 @@ def main(sysArgs: list | None = None) -> GuiMain | None:
             "At least Python 3.10 is required, found %s" % CONFIG.verPyString
         )
         errorCode |= 0x04
-    if CONFIG.verQtValue < 0x060000:
+    if CONFIG.verQtValue < 0x060400:
         errorData.append(
-            "At least Qt6 version 6.0 is required, found %s" % CONFIG.verQtString
+            "At least Qt6 version 6.4 is required, found %s" % CONFIG.verQtString
         )
         errorCode |= 0x08
-    if CONFIG.verPyQtValue < 0x060000:
+    if CONFIG.verPyQtValue < 0x060400:
         errorData.append(
-            "At least PyQt6 version 6.0 is required, found %s" % CONFIG.verPyQtString
+            "At least PyQt6 version 6.4 is required, found %s" % CONFIG.verPyQtString
         )
         errorCode |= 0x10
 
diff --git a/pyproject.toml b/pyproject.toml
index 79ecd45b..e7170be1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ classifiers = [
 ]
 requires-python = ">=3.10"
 dependencies = [
-    "pyqt5>=5.15",
+    "pyqt6>=6.4",
     "pyenchant>=3.0.0",
 ]
 dynamic = ["version"]
diff --git a/setup/debian/control b/setup/debian/control
index 9f9e5756..9877bae0 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 (>=3.10), python3-pyqt5 (>= 5.15), python3-enchant (>= 2.0)
+Build-Depends: dh-python, python3-setuptools, python3-all, debhelper (>= 9), python3 (>=3.10), python3-pyqt6 (>= 6.4), python3-pyqt6.qtsvg (>= 6.4), python3-enchant (>= 2.0)
 Standards-Version: 4.5.1
 Homepage: https://novelwriter.io
 X-Python3-Version: >= 3.10
 
 Package: novelwriter
 Architecture: all
-Depends: ${misc:Depends}, ${python3:Depends}, python3 (>=3.10), python3-pyqt5 (>= 5.15), python3-enchant (>= 2.0)
+Depends: ${misc:Depends}, ${python3:Depends}, python3 (>=3.10), python3-pyqt6 (>= 6.4), python3-pyqt6.qtsvg (>= 6.4), 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/debian/py3dist-overrides b/setup/debian/py3dist-overrides
index 2c65b5a4..2544de40 100644
--- a/setup/debian/py3dist-overrides
+++ b/setup/debian/py3dist-overrides
@@ -1 +1 @@
-pyqt5 python3-pyqt5
+pyqt6 python3-pyqt6