diff --git a/CHANGELOG.md b/CHANGELOG.md
index 070a3eb..fc29a1d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,7 @@ All notable changes to this project will be documented in this file
 
 ## Unreleased
 
-## 2.3.0 2022-02-09
+## 2.3.1 2022-02-09
 
 ### Added
 
@@ -25,6 +25,9 @@ All notable changes to this project will be documented in this file
 ### Changed
 - BREAKING: altered create_grid_container and create_list_container location arguments
 
+## 2.3.0 2022-02-01
+- incorrectly built. Obsolete 
+
 ## 2.2.2 2022-02-01
 
 ### Added
diff --git a/README.md b/README.md
index 4293212..6d8ee97 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ See [DEVELOPING.md](DEVELOPING.md) for details of running tests.
 To install rspace-client and its dependencies, run
 
 ```bash
-pip install rspace-client==2.3.0
+pip install rspace-client==2.3.1
 ```
 
 ### Compatibility with RSpace server versions
diff --git a/pyproject.toml b/pyproject.toml
index 8468ebf..3d7ddc0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "rspace-client"
-version = "2.3.0"
+version = "2.3.1"
 description = "A client for calling RSpace ELN and Inventory APIs"
 license = "Apache-2.0"
 authors = ["Research Innovations Ltd <richard@researchspace.com>"]