diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8e8be35d..75b57823 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,21 @@
 # novelWriter Changelog
 
+## Version 2.0.4 [2023-01-29]
+
+### Release Notes
+
+This is a patch release that fixes a bug where novelWriter would crash if PyQt5 version 5.15.8 was
+installed and imported.
+
+### Detailed Changelog
+
+**Bugfixes**
+
+* Fix an issue with the version check against PyQt5, which was imported from the wrong package when
+  running novelWriter with PyQt5 version 5.15.8, released 2023-01-28. Issue #1324. PR #1325.
+
+----
+
 ## Version 2.0.3 [2023-01-08]
 
 ### Release Notes
diff --git a/novelwriter/__init__.py b/novelwriter/__init__.py
index 48345eea..b1621a76 100644
--- a/novelwriter/__init__.py
+++ b/novelwriter/__init__.py
@@ -59,9 +59,9 @@ __license__    = "GPLv3"
 __author__     = "Veronica Berglyd Olsen"
 __maintainer__ = "Veronica Berglyd Olsen"
 __email__      = "code@vkbo.net"
-__version__    = "2.0.3"
-__hexversion__ = "0x020003f0"
-__date__       = "2023-01-08"
+__version__    = "2.0.4"
+__hexversion__ = "0x020004f0"
+__date__       = "2023-01-29"
 __status__     = "Stable"
 __domain__     = "novelwriter.io"
 __url__        = "https://novelwriter.io"
@@ -179,12 +179,12 @@ def main(sysArgs=None):
             "At least Python 3.7 is required, found %s" % CONFIG.verPyString
         )
         errorCode |= 0x04
-    if CONFIG.verQtValue < 51000:
+    if CONFIG.verQtValue < 0x050a00:
         errorData.append(
             "At least Qt5 version 5.10 is required, found %s" % CONFIG.verQtString
         )
         errorCode |= 0x08
-    if CONFIG.verPyQtValue < 51000:
+    if CONFIG.verPyQtValue < 0x050a00:
         errorData.append(
             "At least PyQt5 version 5.10 is required, found %s" % CONFIG.verPyQtString
         )
diff --git a/novelwriter/assets/text/release_notes.htm b/novelwriter/assets/text/release_notes.htm
index 816cf0f6..4dbba364 100644
--- a/novelwriter/assets/text/release_notes.htm
+++ b/novelwriter/assets/text/release_notes.htm
@@ -109,5 +109,10 @@ been updated and a renderring issue with one of them fixed. Chinese, Norwegian,
 and Spanish translations have been updated as well. A new credits tab has been added to the About
 dialog box, replacing the Credits section on the main About tab.</p>
 
+<h3>Patch 2.0.4 &ndash; 29 January 2023</h3>
+
+<p>This is a patch release that fixes a bug where novelWriter would crash if PyQt5 version 5.15.8
+was installed and imported.</p>
+
 </body>
 </html>
diff --git a/novelwriter/common.py b/novelwriter/common.py
index ea38d841..91058fd0 100644
--- a/novelwriter/common.py
+++ b/novelwriter/common.py
@@ -277,33 +277,6 @@ def yesNo(value):
     return "yes" if value else "no"
 
 
-def splitVersionNumber(value):
-    """Split a version string on the form aa.bb.cc into major, minor
-    and patch, and computes an integer value aabbcc.
-    """
-    if not isinstance(value, str):
-        return 0, 0, 0, 0
-
-    vMajor = 0
-    vMinor = 0
-    vPatch = 0
-    vInt = 0
-
-    vBits = value.split(".")
-    nBits = len(vBits)
-
-    if nBits > 0:
-        vMajor = checkInt(vBits[0], 0)
-    if nBits > 1:
-        vMinor = checkInt(vBits[1], 0)
-    if nBits > 2:
-        vPatch = checkInt(vBits[2], 0)
-
-    vInt = vMajor*10000 + vMinor*100 + vPatch
-
-    return vMajor, vMinor, vPatch, vInt
-
-
 def transferCase(source, target):
     """Transfers the case of the source word to the target word. This
     will consider all upper or lower, and first char capitalisation.
diff --git a/novelwriter/config.py b/novelwriter/config.py
index 1f45b58d..eb84443b 100644
--- a/novelwriter/config.py
+++ b/novelwriter/config.py
@@ -30,14 +30,13 @@ import logging
 from time import time
 from pathlib import Path
 
-from PyQt5.Qt import PYQT_VERSION_STR
 from PyQt5.QtCore import (
-    QT_VERSION_STR, QStandardPaths, QSysInfo, QLocale, QLibraryInfo,
-    QTranslator
+    QT_VERSION, QT_VERSION_STR, PYQT_VERSION, PYQT_VERSION_STR, QStandardPaths,
+    QSysInfo, QLocale, QLibraryInfo, QTranslator
 )
 
 from novelwriter.error import logException, formatException
-from novelwriter.common import checkPath, splitVersionNumber, formatTimeStamp, NWConfigParser
+from novelwriter.common import checkPath, formatTimeStamp, NWConfigParser
 from novelwriter.constants import nwFiles, nwUnicode
 
 logger = logging.getLogger(__name__)
@@ -190,25 +189,13 @@ class Config:
         # ==========================
 
         # Check Qt5 Versions
-        verQt = splitVersionNumber(QT_VERSION_STR)
-        self.verQtString = QT_VERSION_STR
-        self.verQtMajor  = verQt[0]
-        self.verQtMinor  = verQt[1]
-        self.verQtPatch  = verQt[2]
-        self.verQtValue  = verQt[3]
-
-        verQt = splitVersionNumber(PYQT_VERSION_STR)
+        self.verQtString   = QT_VERSION_STR
+        self.verQtValue    = QT_VERSION
         self.verPyQtString = PYQT_VERSION_STR
-        self.verPyQtMajor  = verQt[0]
-        self.verPyQtMinor  = verQt[1]
-        self.verPyQtPatch  = verQt[2]
-        self.verPyQtValue  = verQt[3]
+        self.verPyQtValue  = PYQT_VERSION
 
         # Check Python Version
         self.verPyString = sys.version.split()[0]
-        self.verPyMajor  = sys.version_info[0]
-        self.verPyMinor  = sys.version_info[1]
-        self.verPyPatch  = sys.version_info[2]
         self.verPyHexVal = sys.hexversion
 
         # Check OS Type
diff --git a/novelwriter/error.py b/novelwriter/error.py
index bb803711..50e7ddc0 100644
--- a/novelwriter/error.py
+++ b/novelwriter/error.py
@@ -112,8 +112,7 @@ class NWErrorMessage(QDialog):
         """
         from traceback import format_tb
         from novelwriter import __issuesurl__, __version__
-        from PyQt5.Qt import PYQT_VERSION_STR
-        from PyQt5.QtCore import QT_VERSION_STR, QSysInfo
+        from PyQt5.QtCore import QT_VERSION_STR, PYQT_VERSION_STR, QSysInfo
 
         self.msgHead.setText((
             "<p>An unhandled error has been encountered.</p>"
diff --git a/novelwriter/gui/doceditor.py b/novelwriter/gui/doceditor.py
index 1430d174..99104c00 100644
--- a/novelwriter/gui/doceditor.py
+++ b/novelwriter/gui/doceditor.py
@@ -2512,7 +2512,7 @@ class GuiDocEditSearch(QFrame):
             # Using the Unicode-capable QRegularExpression class was
             # only added in Qt 5.13. Otherwise, 5.3 and up supports
             # only the QRegExp class.
-            if self.mainConf.verQtValue >= 51300:
+            if self.mainConf.verQtValue >= 0x050d00:
                 rxOpt = QRegularExpression.UseUnicodePropertiesOption
                 if not self.isCaseSense:
                     rxOpt |= QRegularExpression.CaseInsensitiveOption
diff --git a/novelwriter/guimain.py b/novelwriter/guimain.py
index aa26b95d..a7f03cb7 100644
--- a/novelwriter/guimain.py
+++ b/novelwriter/guimain.py
@@ -87,9 +87,9 @@ class GuiMain(QMainWindow):
         logger.info("OS: %s", self.mainConf.osType)
         logger.info("Kernel: %s", self.mainConf.kernelVer)
         logger.info("Host: %s", self.mainConf.hostName)
-        logger.info("Qt5: %s (%d)", self.mainConf.verQtString, self.mainConf.verQtValue)
-        logger.info("PyQt5: %s (%d)", self.mainConf.verPyQtString, self.mainConf.verPyQtValue)
-        logger.info("Python: %s (0x%x)", self.mainConf.verPyString, self.mainConf.verPyHexVal)
+        logger.info("Qt5: %s (0x%06x)", self.mainConf.verQtString, self.mainConf.verQtValue)
+        logger.info("PyQt5: %s (0x%06x)", self.mainConf.verPyQtString, self.mainConf.verPyQtValue)
+        logger.info("Python: %s (0x%08x)", self.mainConf.verPyString, self.mainConf.verPyHexVal)
         logger.info("GUI Language: %s", self.mainConf.guiLocale)
 
         # Core Classes
diff --git a/sample/nwProject.nwx b/sample/nwProject.nwx
index 6204d2d0..95b57f16 100644
--- a/sample/nwProject.nwx
+++ b/sample/nwProject.nwx
@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='utf-8'?>
-<novelWriterXML appVersion="2.0.3" hexVersion="0x020003f0" fileVersion="1.5" timeStamp="2023-01-08 19:10:50">
-  <project id="e2be99af-f9bf-4403-857a-c3d1ac25abea" saveCount="1467" autoCount="237" editTime="74387">
+<novelWriterXML appVersion="2.0.4" hexVersion="0x020004f0" fileVersion="1.5" timeStamp="2023-01-29 02:33:40">
+  <project id="e2be99af-f9bf-4403-857a-c3d1ac25abea" saveCount="1468" autoCount="237" editTime="74401">
     <name>Sample Project</name>
     <title>Sample Project</title>
     <author>Jane Smith</author>
diff --git a/tests/test_base/test_base_common.py b/tests/test_base/test_base_common.py
index 0aec498a..5559439e 100644
--- a/tests/test_base/test_base_common.py
+++ b/tests/test_base/test_base_common.py
@@ -33,9 +33,9 @@ from novelwriter.common import (
     checkStringNone, checkString, checkInt, checkFloat, checkBool, checkHandle,
     checkUuid, checkPath, isHandle, isTitleTag, isItemClass, isItemType,
     isItemLayout, hexToInt, minmax, checkIntTuple, formatInt, formatTimeStamp,
-    formatTime, simplified, yesNo, splitVersionNumber, transferCase, fuzzyTime,
-    numberToRoman, jsonEncode, readTextFile, makeFileNameSafe, sha256sum,
-    getGuiItem, NWConfigParser
+    formatTime, simplified, yesNo, transferCase, fuzzyTime, numberToRoman,
+    jsonEncode, readTextFile, makeFileNameSafe, sha256sum, getGuiItem,
+    NWConfigParser
 )
 
 
@@ -398,25 +398,6 @@ def testBaseCommon_YesNo():
 # END Test testBaseCommon_YesNo
 
 
-@pytest.mark.base
-def testBaseCommon_SplitVersionNumber():
-    """Test the splitVersionNumber function.
-    """
-    # OK Values
-    assert splitVersionNumber("1") == (1, 0, 0, 10000)
-    assert splitVersionNumber("1.2") == (1, 2, 0, 10200)
-    assert splitVersionNumber("1.2.3") == (1, 2, 3, 10203)
-    assert splitVersionNumber("1.2.3.4") == (1, 2, 3, 10203)
-    assert splitVersionNumber("99.99.99") == (99, 99, 99, 999999)
-
-    # Failed Values
-    assert splitVersionNumber(None) == (0, 0, 0, 0)
-    assert splitVersionNumber(1234) == (0, 0, 0, 0)
-    assert splitVersionNumber("1.2abc") == (1, 0, 0, 10000)
-
-# END Test testBaseCommon_SplitVersionNumber
-
-
 @pytest.mark.base
 def testBaseCommon_FormatInt():
     """Test the formatInt function.
diff --git a/tests/test_base/test_base_init.py b/tests/test_base/test_base_init.py
index 1d41c8de..3c5b6780 100644
--- a/tests/test_base/test_base_init.py
+++ b/tests/test_base/test_base_init.py
@@ -155,8 +155,8 @@ def testBaseInit_Imports(caplog, monkeypatch, tmpPath):
     monkeypatch.setattr("PyQt5.QtWidgets.QErrorMessage.showMessage", lambda *a: None)
     monkeypatch.setitem(sys.modules, "lxml", None)
     monkeypatch.setattr("sys.hexversion", 0x0)
-    monkeypatch.setattr("novelwriter.CONFIG.verQtValue", 50000)
-    monkeypatch.setattr("novelwriter.CONFIG.verPyQtValue", 50000)
+    monkeypatch.setattr("novelwriter.CONFIG.verQtValue", 0x050000)
+    monkeypatch.setattr("novelwriter.CONFIG.verPyQtValue", 0x050000)
 
     with pytest.raises(SystemExit) as ex:
         _ = novelwriter.main(