diff --git a/.mailmap b/.mailmap
new file mode 100644
index 00000000..56308906
--- /dev/null
+++ b/.mailmap
@@ -0,0 +1 @@
+Jaco <jacogr@gmail.com>
diff --git a/package.json b/package.json
index e7f98229..13989122 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   },
   "devDependencies": {
     "@babel/core": "^7.16.7",
-    "@polkadot/dev": "^0.65.8",
+    "@polkadot/dev": "^0.65.9",
     "fflate": "^0.7.2",
     "override-require": "^1.1.1"
   },
diff --git a/yarn.lock b/yarn.lock
index 56d1070a..3a1776a8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1854,9 +1854,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/dev@npm:^0.65.8":
-  version: 0.65.8
-  resolution: "@polkadot/dev@npm:0.65.8"
+"@polkadot/dev@npm:^0.65.9":
+  version: 0.65.9
+  resolution: "@polkadot/dev@npm:0.65.9"
   dependencies:
     "@babel/cli": ^7.16.7
     "@babel/core": ^7.16.7
@@ -1942,7 +1942,7 @@ __metadata:
     polkadot-exec-rollup: scripts/polkadot-exec-rollup.mjs
     polkadot-exec-tsc: scripts/polkadot-exec-tsc.mjs
     polkadot-exec-webpack: scripts/polkadot-exec-webpack.mjs
-  checksum: 0cba3d1bda2fa9420ea0574d24168d93649d55b5cca7dbdc07cd6194e42236a86bdf463a743ebe24f7a0a32a1a94ec694a6bf461413b4200b0c98296eac80d25
+  checksum: 24ac47bbd4c4b27723edc7652120ff78df047cb5577ddf95c43504fc8eb4ed6981a443fe67e0a6fb4581170a77cd97f5b64f49d6c2e0cf1ccfb3d15945da0203
   languageName: node
   linkType: hard
 
@@ -8414,7 +8414,7 @@ resolve@^2.0.0-next.3:
   resolution: "root-workspace-0b6124@workspace:."
   dependencies:
     "@babel/core": ^7.16.7
-    "@polkadot/dev": ^0.65.8
+    "@polkadot/dev": ^0.65.9
     fflate: ^0.7.2
     override-require: ^1.1.1
   languageName: unknown