diff --git a/lerna.json b/lerna.json
index bb47925928..96fad0da9a 100644
--- a/lerna.json
+++ b/lerna.json
@@ -10,5 +10,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "0.5.1"
+  "version": "0.5.2"
 }
diff --git a/packages/api-format/package.json b/packages/api-format/package.json
index 1b6790639a..2c9d72373b 100644
--- a/packages/api-format/package.json
+++ b/packages/api-format/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-format",
-  "version": "0.5.0",
+  "version": "0.5.2",
   "description": "Input/Output formatters for JsonRPC exchange",
   "main": "index.js",
   "keywords": [
@@ -30,7 +30,7 @@
     "test": "echo \"Tests only available from root wrapper\""
   },
   "devDependencies": {
-    "@polkadot/api-jsonrpc": "^0.5.0",
+    "@polkadot/api-jsonrpc": "^0.5.2",
     "@polkadot/dev": "^0.9.1"
   },
   "dependencies": {
diff --git a/packages/api-jsonrpc/package.json b/packages/api-jsonrpc/package.json
index 509da01db3..13f5de4060 100644
--- a/packages/api-jsonrpc/package.json
+++ b/packages/api-jsonrpc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-jsonrpc",
-  "version": "0.5.0",
+  "version": "0.5.2",
   "description": "Method definitions for the Polkadot RPC layer",
   "main": "index.js",
   "engines": {
diff --git a/packages/api-provider/package.json b/packages/api-provider/package.json
index 64a7e63630..e42da8618b 100644
--- a/packages/api-provider/package.json
+++ b/packages/api-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-provider",
-  "version": "0.5.0",
+  "version": "0.5.2",
   "description": "Transport providers for the API",
   "main": "index.js",
   "keywords": [
diff --git a/packages/api/package.json b/packages/api/package.json
index 7919d72791..7da000efba 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "0.5.0",
+  "version": "0.5.2",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "keywords": [
@@ -33,9 +33,9 @@
     "@polkadot/dev": "^0.9.1"
   },
   "dependencies": {
-    "@polkadot/api-format": "^0.5.0",
-    "@polkadot/api-jsonrpc": "^0.5.0",
-    "@polkadot/api-provider": "^0.5.0",
+    "@polkadot/api-format": "^0.5.2",
+    "@polkadot/api-jsonrpc": "^0.5.2",
+    "@polkadot/api-provider": "^0.5.2",
     "@polkadot/util": "^0.5.15",
     "babel-runtime": "^6.26.0"
   }
diff --git a/yarn.lock b/yarn.lock
index 09c4d8e678..d40a560fc7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -89,6 +89,41 @@
     stylelint "^8.2.0"
     stylelint-config-standard "^18.0.0"
 
+"@polkadot/dev@^0.9.3":
+  version "0.9.3"
+  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.9.3.tgz#fac90744ca304fe888f0931757c079f32f96015d"
+  dependencies:
+    babel-cli "^6.26.0"
+    babel-core "^6.26.0"
+    babel-eslint "^8.0.2"
+    babel-plugin-transform-class-properties "^6.24.1"
+    babel-plugin-transform-flow-strip-types "^6.22.0"
+    babel-plugin-transform-object-rest-spread "^6.26.0"
+    babel-plugin-transform-runtime "^6.23.0"
+    babel-preset-env "^1.6.1"
+    babel-preset-flow "^6.23.0"
+    babel-preset-stage-0 "^6.24.1"
+    coveralls "^3.0.0"
+    dox "^0.9.0"
+    eslint "^4.11.0"
+    eslint-config-semistandard "^11.0.0"
+    eslint-config-standard "^10.2.1"
+    eslint-config-standard-react "^5.0.0"
+    eslint-plugin-flowtype "^2.39.1"
+    eslint-plugin-import "^2.8.0"
+    eslint-plugin-node "^5.2.1"
+    eslint-plugin-promise "^3.6.0"
+    eslint-plugin-react "^7.4.0"
+    eslint-plugin-standard "^3.0.1"
+    flow-bin "^0.59.0"
+    flow-copy-source "^1.2.1"
+    jest "^21.2.1"
+    makeshift "^1.1.0"
+    mkdirp "^0.5.1"
+    rimraf "^2.6.2"
+    stylelint "^8.2.0"
+    stylelint-config-standard "^18.0.0"
+
 "@polkadot/util@^0.5.15":
   version "0.5.15"
   resolved "https://registry.yarnpkg.com/@polkadot/util/-/util-0.5.15.tgz#0e1ef0cec9699fd9c9ec1a324eefd074fcb423a5"