diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7be1f0c7..53e06166 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## v4.0.5
+**Wollok Version: `3.1.9`**
+
+- Update Wollok version.
+- Fixed #159 and #164 - Singleton abstract methods validation
+- Fixed #172 - Filtering wollok base frames from stack trace & adding constants
+
+
 ## v4.0.4
 **Wollok Version: `3.1.8`**
 
diff --git a/package.json b/package.json
index 5f025636..d65a3a42 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wollok-ts",
-  "version": "4.0.5",
+  "version": "4.0.6",
   "wollokVersion": "3.1.9",
   "description": "TypeScript based Wollok language implementation",
   "repository": "https://github.com/uqbar-project/wollok-ts",