diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 07f7d8d4b..7983433ed 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,12 @@
-`Unreleased <https://github.com/pace-neutrons/Euphonic/compare/v1.3.2...HEAD>`_
+`Unreleased <https://github.com/pace-neutrons/Euphonic/compare/v1.4.0...HEAD>`_
 -------------------------------------------------------------------------------
 
+`v1.4.0 <https://github.com/pace-neutrons/Euphonic/compare/v1.3.2...v1.4.0>`_
+-----------------------------------------------------------------------------
+
+This release includes some significant modernisation and maintenance,
+as well as new features and performance enhancements.
+
 - Requirements
 
   - Python 3.8, 3.9 is no longer supported
diff --git a/CITATION.cff b/CITATION.cff
index 373171fed..0ebf37255 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -33,7 +33,7 @@ authors:
     given-names: "Jacob S."
 title: "Euphonic"
 doi: 10.5286/SOFTWARE/EUPHONIC
-version: 1.3.2
+version: 1.4.0
 date-released: 2024-01-30
 license: GPL-3.0-only
 repository-code: https://github.com/pace-neutrons/Euphonic
diff --git a/build_utils/release.py b/build_utils/release.py
index 8558477a8..530f09450 100644
--- a/build_utils/release.py
+++ b/build_utils/release.py
@@ -23,9 +23,9 @@ def release_github(test=True):
     with open('CITATION.cff') as f:
         citation = yaml.safe_load(f)
 
-    euphonic_ver = 'v' + __version__
+    euphonic_ver = __version__
     version_dict = {}
-    version_dict['CHANGELOG.rst'] = re.findall('\n`(v\d+\.\d+\.\S+)\s',
+    version_dict['CHANGELOG.rst'] = re.findall(r'\n`(v\d+\.\d+\.\S+)\s',
                                                changelog)[0]
     version_dict['CITATION.cff'] = 'v' + citation['version']
     for ver_name, ver in version_dict.items():
@@ -35,7 +35,7 @@ def release_github(test=True):
                 f'euphonic.__version__: {euphonic_ver} {ver_name}: '
                 f'{ver}'))
 
-    desc = re.search('`v\d+\.\d+\.\S+.*?^-+\n(.*?)^`v', changelog,
+    desc = re.search(r'`v\d+\.\d+\.\S+.*?^-+\n(.*?)^`v', changelog,
                      re.DOTALL | re.MULTILINE).groups()[0].strip()
     payload = {
         "tag_name": euphonic_ver,
diff --git a/euphonic/version.py b/euphonic/version.py
index 446842908..c1a634494 100644
--- a/euphonic/version.py
+++ b/euphonic/version.py
@@ -1 +1 @@
-__version__ = "v1.3.1a1"
+__version__ = "v1.4.0"