diff --git a/CMakeLists.txt b/CMakeLists.txt
index 879ae1f47..d4107e8fa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,7 +24,7 @@ endif()
 
 find_package( ecbuild 3.4 REQUIRED HINTS ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/../ecbuild /workspace/ecbuild) # Before project()
 
-project( ecflow LANGUAGES CXX VERSION 5.13.3 )
+project( ecflow LANGUAGES CXX VERSION 5.13.4 )
 
 # Important: the project version is used, as generated CMake variables, to filter .../ecflow/core/ecflow_version.h.in
 
diff --git a/docs/conf.py b/docs/conf.py
index bd2106f95..0dbfbf679 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -93,7 +93,7 @@
 
 
 def get_ecflow_version():
-    version = "5.13.3"
+    version = "5.13.4"
     ecflow_version = version.split(".")
     print("Extracted ecflow version '" + str(ecflow_version))
     return ecflow_version
diff --git a/docs/release_notes/version_5.13.rst b/docs/release_notes/version_5.13.rst
index 08e4152c3..ee8845ffc 100644
--- a/docs/release_notes/version_5.13.rst
+++ b/docs/release_notes/version_5.13.rst
@@ -6,6 +6,17 @@ Version 5.13 updates
 .. role:: jiraissue
    :class: hidden
 
+Version 5.13.4
+==============
+
+* `Released <https://confluence.ecmwf.int/display/ECFLOW/Releases>`__\  on 2024-09-04
+
+General
+-------
+
+- **Fix** eliminate memory leaks detected while using ecFlow UI :jiraissue:`ECFLOW-1969`
+- **Fix** modernise use of Boost.ASIO to build with Boost 1.86 :jiraissue:`ECFLOW-1973`
+
 Version 5.13.3
 ==============
 
diff --git a/libs/pyext/ecflow/__init__.py b/libs/pyext/ecflow/__init__.py
index 6c8b2d138..afc50e0da 100644
--- a/libs/pyext/ecflow/__init__.py
+++ b/libs/pyext/ecflow/__init__.py
@@ -15,6 +15,6 @@
 The ecFlow python module
 """
 
-__version__ = '5.13.3'
+__version__ = '5.13.4'
 
 # http://stackoverflow.com/questions/13040646/how-do-i-create-documentation-with-pydoc