diff --git a/changelog b/changelog
index a4f69c6eaf..45fff9fd58 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,6 @@
+
+release 2.4.0 29th of September 2023
+
 	1) PR #1758 for #1741. Splits the PSyData read functionality into a
 	standalone module to remove dependence on infrastructure for
 	driver code.
diff --git a/doc/reference_guide/doxygen.config b/doc/reference_guide/doxygen.config
index 5d5204c723..e1cba21ff0 100644
--- a/doc/reference_guide/doxygen.config
+++ b/doc/reference_guide/doxygen.config
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Reference Guide"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 2.3.1
+PROJECT_NUMBER         = 2.4.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/doc/reference_guide/source/conf.py b/doc/reference_guide/source/conf.py
index 0a6f1c68b8..e952f82f5f 100644
--- a/doc/reference_guide/source/conf.py
+++ b/doc/reference_guide/source/conf.py
@@ -28,7 +28,7 @@
 # The short X.Y version
 version = ''
 # The full version, including alpha/beta/rc tags
-release = '2.3.1'
+release = '2.4.0'
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/external/fparser b/external/fparser
index 5018a64e76..2c8ed3781e 160000
--- a/external/fparser
+++ b/external/fparser
@@ -1 +1 @@
-Subproject commit 5018a64e765187b444a3e3540eb2c0dd10262f24
+Subproject commit 2c8ed3781e9796eaf6685aff881367ccea2e451d
diff --git a/psyclone.pdf b/psyclone.pdf
index 274036df24..11d96df604 100644
Binary files a/psyclone.pdf and b/psyclone.pdf differ
diff --git a/src/psyclone/version.py b/src/psyclone/version.py
index 9e5ef80053..cef0051ec2 100644
--- a/src/psyclone/version.py
+++ b/src/psyclone/version.py
@@ -1,7 +1,7 @@
 # -----------------------------------------------------------------------------
 # BSD 3-Clause License
 #
-# Copyright (c) 2017-2022, Science and Technology Facilities Council.
+# Copyright (c) 2017-2023, Science and Technology Facilities Council.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -38,8 +38,8 @@
     used in setup.py and doc/conf.py '''
 
 __MAJOR__ = 2
-__MINOR__ = 3
-__MICRO__ = 1
+__MINOR__ = 4
+__MICRO__ = 0
 
 __SHORT_VERSION__ = f"{__MAJOR__:d}.{__MINOR__:d}"
 __VERSION__ = f"{__MAJOR__:d}.{__MINOR__:d}.{__MICRO__:d}"