diff --git a/package.json b/package.json
index 6a7b11463..755d4961f 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   },
   "devDependencies": {
     "@babel/core": "^7.4.4",
-    "@polkadot/dev": "^0.30.0-beta.3",
+    "@polkadot/dev": "^0.30.0-beta.4",
     "@polkadot/ts": "^0.1.56",
     "gh-pages": "^2.0.1"
   }
diff --git a/yarn.lock b/yarn.lock
index 5f232c480..47780b522 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1625,10 +1625,10 @@
     universal-user-agent "^2.0.0"
     url-template "^2.0.8"
 
-"@polkadot/dev@^0.30.0-beta.3":
-  version "0.30.0-beta.3"
-  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.30.0-beta.3.tgz#22ed6cfa735520f75e43020cf6673ec4d376ee48"
-  integrity sha512-mb4d+OJfWRx/pmsOKH29rRUq0Htoxl8MdIufnbikIW9aTROK5yULhkeB7SUKuYglVFhr+z1HGDx7MYBzDqjrhA==
+"@polkadot/dev@^0.30.0-beta.4":
+  version "0.30.0-beta.4"
+  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.30.0-beta.4.tgz#10403838cba964a21d2cc6740fdb74c9b9244038"
+  integrity sha512-ugJkBxvGOebSQQSL+zhIPAHUdnNxy5qGSUPnSh+7ss5g2rYzf6zIpUIlAJ78heF+vmTebD+6VmjwW9jQ7XbnCA==
   dependencies:
     "@babel/cli" "^7.4.4"
     "@babel/core" "^7.4.4"