diff --git a/lerna.json b/lerna.json
index 3d3c0e5..0c5ada6 100644
--- a/lerna.json
+++ b/lerna.json
@@ -3,7 +3,7 @@
   "packages": [
     "packages/*"
   ],
-  "version": "0.3.0",
+  "version": "0.4.0",
   "useWorkspaces": true,
   "command": {
     "publish": {
diff --git a/packages/as-proto-gen/package.json b/packages/as-proto-gen/package.json
index 347b556..94eeaf9 100644
--- a/packages/as-proto-gen/package.json
+++ b/packages/as-proto-gen/package.json
@@ -1,6 +1,6 @@
 {
   "name": "as-proto-gen",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "license": "MIT",
   "main": "lib/index.js",
   "author": "Piotr Oleś <piotrek.oles@gmail.com>",
diff --git a/packages/as-proto/package.json b/packages/as-proto/package.json
index 48dd784..723cb96 100644
--- a/packages/as-proto/package.json
+++ b/packages/as-proto/package.json
@@ -1,6 +1,6 @@
 {
   "name": "as-proto",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "main": "assembly/index.ts",
   "types": "assembly/index.ts",
   "license": "MIT",