diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a0b43d1..3ed7da9b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+## [1.20.0](https://github.com/johnwalley/allotment/compare/v1.19.5...v1.20.0) (2024-01-15)
+
+
+### Features
+
+* allow customising sash animation duration ([#740](https://github.com/johnwalley/allotment/issues/740)) ([e92b944](https://github.com/johnwalley/allotment/commit/e92b9446d72fc034fc960e0a80901d9137781421))
+
 ## [1.19.5](https://github.com/johnwalley/allotment/compare/v1.19.4...v1.19.5) (2024-01-05)
 
 
diff --git a/package-lock.json b/package-lock.json
index 44b11fd3..fe4d39aa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "allotment",
-  "version": "1.19.5",
+  "version": "1.20.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "allotment",
-      "version": "1.19.5",
+      "version": "1.20.0",
       "license": "MIT",
       "dependencies": {
         "classnames": "^2.3.0",
diff --git a/package.json b/package.json
index 8cdabef8..ca544644 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "allotment",
-  "version": "1.19.5",
+  "version": "1.20.0",
   "description": "React split-pane component",
   "exports": {
     ".": {