diff --git a/.gitignore b/.gitignore
index f41c90d..c08a8b7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ tmp/
 .env.development.local
 .env.test.local
 .env.production.local
+.npmrc
 package-lock.json
 npm-debug.log*
 yarn-debug.log*
diff --git a/package.json b/package.json
index 960a912..90c61df 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,6 @@
   },
   "devDependencies": {
     "@babel/core": "^7.2.2",
-    "@polkadot/dev": "^0.23.8"
+    "@polkadot/dev": "^0.23.9"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 4f81607..ec86a67 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1277,10 +1277,10 @@
   resolved "https://registry.yarnpkg.com/@nodelib/fs.stat/-/fs.stat-1.1.3.tgz#2b5a3ab3f918cca48a8c754c08168e3f03eba61b"
   integrity sha512-shAmDyaQC4H92APFoIaVDHCx5bStIocgvbwQyxPRrbUY20V1EYTbSDchWbuwlMG3V17cprZhA6+78JfB+3DTPw==
 
-"@polkadot/dev@^0.23.8":
-  version "0.23.8"
-  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.23.8.tgz#c0507eb3eee0e1c916b69c8790dfbfa47a0fd324"
-  integrity sha512-s/dK2wZvUdjFZWUJ7Q83ShSlcSrUA+3iM5QZ7mN2k9JGJAI9NxQ22EjMwNreOGneJikzHNQRVbMCcwhh5tiZwA==
+"@polkadot/dev@^0.23.9":
+  version "0.23.9"
+  resolved "https://registry.yarnpkg.com/@polkadot/dev/-/dev-0.23.9.tgz#dc40dcfccd987b9160d6ad9be6b303dfca407d72"
+  integrity sha512-DE5uhjLnv8fjhuztcy6riHcpnSW029ObtQuDchjQOOo2KU+YNxDAM0yNXIymdALuu7ZC75bjKembZl1AGF+oSw==
   dependencies:
     "@babel/cli" "^7.2.3"
     "@babel/core" "^7.2.2"
@@ -1307,7 +1307,6 @@
     gitbook-plugin-sunlight-highlighter "^0.4.3"
     jest "^23.6.0"
     lerna "^3.8.4"
-    makeshift "^1.1.0"
     mkdirp "^0.5.1"
     rimraf "^2.6.3"
     tslint "^5.12.0"
@@ -1962,7 +1961,7 @@ block-stream@*, block-stream@0.0.9:
   dependencies:
     inherits "~2.0.0"
 
-bluebird@^3.4.1, bluebird@^3.5.0, bluebird@^3.5.1, bluebird@^3.5.3, bluebird@~3.5.0:
+bluebird@^3.5.0, bluebird@^3.5.1, bluebird@^3.5.3, bluebird@~3.5.0:
   version "3.5.3"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.3.tgz#7d01c6f9616c9a51ab0f8c549a79dfe6ec33efa7"
   integrity sha512-/qKPUQlaW1OyR51WeCPBvRnAlnZFUJkCSG5HzGnuIqhgyJtF+T94lFnn33eiazjRm2LAHVy2guNnaq48X9SJuw==
@@ -5706,17 +5705,6 @@ makeerror@1.0.x:
   dependencies:
     tmpl "1.0.x"
 
-makeshift@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/makeshift/-/makeshift-1.1.0.tgz#03819e68ebb5a0939edc20e7ea230c8818e2b4c4"
-  integrity sha512-wrL4SLWEDFlGLRHmO4r+6eMlu5z2Aj73CRpB0iDtRSkznFbN8/S4VNI8kxeClIJM5nZi1mrI+HcNegVw5orO3w==
-  dependencies:
-    bluebird "^3.4.1"
-    chalk "^2.0.1"
-    figures "^2.0.0"
-    sywac "^1.0.0"
-    url-parse-as-address "^1.0.0"
-
 map-age-cleaner@^0.1.1:
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/map-age-cleaner/-/map-age-cleaner-0.1.3.tgz#7d583a7306434c055fe474b0f45078e6e1b4b92a"
@@ -8376,11 +8364,6 @@ symbol-tree@^3.2.1, symbol-tree@^3.2.2:
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.2.tgz#ae27db38f660a7ae2e1c3b7d1bc290819b8519e6"
   integrity sha1-rifbOPZgp64uHDt9G8KQgZuFGeY=
 
-sywac@^1.0.0:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/sywac/-/sywac-1.2.1.tgz#528e482b2f2a18e764ffccc59eb40eea16a7f97d"
-  integrity sha512-bf8agjBAV9mm90k2nWoobe48bO/XugTS86W4dGYTpzVlfFv1cmWsRrQ9hUKIfoDaIRaXIta/BLFINmmxfV+otg==
-
 tar-fs@^1.15.3:
   version "1.16.3"
   resolved "https://registry.yarnpkg.com/tar-fs/-/tar-fs-1.16.3.tgz#966a628841da2c4010406a82167cbd5e0c72d509"
@@ -8873,11 +8856,6 @@ urix@^0.1.0:
   resolved "https://registry.yarnpkg.com/urix/-/urix-0.1.0.tgz#da937f7a62e21fec1fd18d49b35c2935067a6c72"
   integrity sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=
 
-url-parse-as-address@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/url-parse-as-address/-/url-parse-as-address-1.0.0.tgz#fb80901883f338b3cbed3538f5faa26adaf7f2e7"
-  integrity sha1-+4CQGIPzOLPL7TU49fqiatr38uc=
-
 url-parse-lax@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/url-parse-lax/-/url-parse-lax-1.0.0.tgz#7af8f303645e9bd79a272e7a14ac68bc0609da73"