diff --git a/CHANGELOG.md b/CHANGELOG.md
index 330954a..4c56be5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,5 @@
 # Changelog
 
-## (dev)
+## 1.0.0 (2022-06-27)
 
-- TBW.
+- Initial release.
diff --git a/package.json b/package.json
index 60e104d..c3db394 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cubux/readonly-map",
-  "version": "0.1.0",
+  "version": "1.0.0",
   "description": "Functions to work with read-only maps",
   "keywords": [
     "map",