diff --git a/HISTORY.md b/HISTORY.md
index 44b8d4a..3cfc42e 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -3,7 +3,7 @@
 https://github.com/josdejong/jsoneditor
 
 
-## not yet published, version 8.6.6
+## 2020-04-21, version 8.6.6
 
 - Fix #969: adding a new property to an empty object or array is broken.
   Regression introduced in `v8.6.5`.
diff --git a/package-lock.json b/package-lock.json
index ece2abc..2c45807 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "jsoneditor",
-  "version": "8.6.5",
+  "version": "8.6.6",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index ed6c339..3ff84dd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jsoneditor",
-  "version": "8.6.5",
+  "version": "8.6.6",
   "main": "./index",
   "description": "A web-based tool to view, edit, format, and validate JSON",
   "tags": [