diff --git a/CHANGELOG.md b/CHANGELOG.md
index 94590e04..652a7324 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,18 @@
 # Change Log
 
-## 0.4.26
+## 0.5.1 - IRT ready
+
+- support {free: true} in #export DBSolve
+- update _Component.clone() method to exclude cloning of namespace
+- fixes to sbmlParse() function for clear math expressions
+- "src/browser.js" is an entry point for browser apps and webpack
+- methos references() to _Component
+- add "omit" property to #export formats: JSON, YAML, XLSX
+- exclude "fs" and "path" libs from core code for browser support
+- updates to nunjucks temmplates for easy usage in browser apps
+- remove specific JS errors from Container and components
+- multiple dependensies updates
+
+## 0.5.0 - first public
 
-- first public commit
 - corresponds to Heta standard v0.2.4, see <https://hetalang.github.io/>
diff --git a/package.json b/package.json
index afa863c9..93d00f02 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "heta-compiler",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Programming platform for Quantitative Systems Pharmacology modeling in NodeJS",
   "main": "src/index.js",
   "scripts": {