diff --git a/lerna.json b/lerna.json
index 6a25fe34..349f719e 100644
--- a/lerna.json
+++ b/lerna.json
@@ -6,5 +6,5 @@
   "publishConfig": {
     "directory": "build"
   },
-  "version": "0.15.0-alpha.3"
+  "version": "0.15.0-alpha.4"
 }
diff --git a/packages/node-api/package.json b/packages/node-api/package.json
index b17e0ae0..3d145a08 100644
--- a/packages/node-api/package.json
+++ b/packages/node-api/package.json
@@ -18,10 +18,10 @@
   },
   "sideEffects": false,
   "type": "module",
-  "version": "0.15.0-alpha.3",
+  "version": "0.15.0-alpha.4",
   "main": "index.js",
   "dependencies": {
-    "@encointer/types": "^0.15.0-alpha.3",
+    "@encointer/types": "^0.15.0-alpha.4",
     "@polkadot/api": "^11.2.1",
     "tslib": "^2.6.2"
   },
diff --git a/packages/types/package.json b/packages/types/package.json
index a9c5b144..2ad37f84 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -18,7 +18,7 @@
   },
   "sideEffects": false,
   "type": "module",
-  "version": "0.15.0-alpha.3",
+  "version": "0.15.0-alpha.4",
   "main": "index.js",
   "scripts": {
     "generate:defs": "node --experimental-specifier-resolution=node --loader ts-node/esm  ../../node_modules/.bin/polkadot-types-from-defs --package @encointer/types/interfaces  --input ./src/interfaces",
diff --git a/packages/util/package.json b/packages/util/package.json
index 3f9a60ff..0a8227f7 100644
--- a/packages/util/package.json
+++ b/packages/util/package.json
@@ -20,7 +20,7 @@
   "sideEffects": false,
   "type": "module",
   "types": "./index.d.ts",
-  "version": "0.15.0-alpha.3",
+  "version": "0.15.0-alpha.4",
   "main": "index.js",
   "dependencies": {
     "@babel/runtime": "^7.18.9",
diff --git a/packages/worker-api/package.json b/packages/worker-api/package.json
index c317e3e2..0e19c598 100644
--- a/packages/worker-api/package.json
+++ b/packages/worker-api/package.json
@@ -19,12 +19,12 @@
   "sideEffects": false,
   "type": "module",
   "types": "./index.d.ts",
-  "version": "0.15.0-alpha.3",
+  "version": "0.15.0-alpha.4",
   "main": "index.js",
   "dependencies": {
-    "@encointer/node-api": "^0.15.0-alpha.3",
-    "@encointer/types": "^0.15.0-alpha.3",
-    "@encointer/util": "^0.15.0-alpha.3",
+    "@encointer/node-api": "^0.15.0-alpha.4",
+    "@encointer/types": "^0.15.0-alpha.4",
+    "@encointer/util": "^0.15.0-alpha.4",
     "@peculiar/webcrypto": "^1.4.6",
     "@polkadot/api": "^11.2.1",
     "@polkadot/keyring": "^12.6.2",
diff --git a/yarn.lock b/yarn.lock
index a99bccc2..70a0a81f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -755,18 +755,18 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@encointer/node-api@npm:^0.15.0-alpha.3, @encointer/node-api@workspace:packages/node-api":
+"@encointer/node-api@npm:^0.15.0-alpha.4, @encointer/node-api@workspace:packages/node-api":
   version: 0.0.0-use.local
   resolution: "@encointer/node-api@workspace:packages/node-api"
   dependencies:
-    "@encointer/types": "npm:^0.15.0-alpha.3"
+    "@encointer/types": "npm:^0.15.0-alpha.4"
     "@polkadot/api": "npm:^11.2.1"
     "@polkadot/util-crypto": "npm:^12.6.2"
     tslib: "npm:^2.6.2"
   languageName: unknown
   linkType: soft
 
-"@encointer/types@npm:^0.15.0-alpha.3, @encointer/types@workspace:packages/types":
+"@encointer/types@npm:^0.15.0-alpha.4, @encointer/types@workspace:packages/types":
   version: 0.0.0-use.local
   resolution: "@encointer/types@workspace:packages/types"
   dependencies:
@@ -781,7 +781,7 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@encointer/util@npm:^0.15.0-alpha.3, @encointer/util@workspace:packages/util":
+"@encointer/util@npm:^0.15.0-alpha.4, @encointer/util@workspace:packages/util":
   version: 0.0.0-use.local
   resolution: "@encointer/util@workspace:packages/util"
   dependencies:
@@ -798,9 +798,9 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@encointer/worker-api@workspace:packages/worker-api"
   dependencies:
-    "@encointer/node-api": "npm:^0.15.0-alpha.3"
-    "@encointer/types": "npm:^0.15.0-alpha.3"
-    "@encointer/util": "npm:^0.15.0-alpha.3"
+    "@encointer/node-api": "npm:^0.15.0-alpha.4"
+    "@encointer/types": "npm:^0.15.0-alpha.4"
+    "@encointer/util": "npm:^0.15.0-alpha.4"
     "@peculiar/webcrypto": "npm:^1.4.6"
     "@polkadot/api": "npm:^11.2.1"
     "@polkadot/keyring": "npm:^12.6.2"