diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index e22684da99aa..2f8d624ff4e0 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -3,7 +3,6 @@
   "version": "3.5.2-15",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
-  "module": "index.mjs",
   "sideEffects": false,
   "author": "Jaco Greeff <jacogr@gmail.com>",
   "maintainers": [],
@@ -16,8 +15,8 @@
     "@babel/runtime": "^7.12.5",
     "@polkadot/api": "3.5.2-15",
     "@polkadot/types": "3.5.2-15",
-    "@polkadot/util": "^5.4.1",
-    "@polkadot/x-rxjs": "5.4.1",
+    "@polkadot/util": "^5.4.2",
+    "@polkadot/x-rxjs": "^5.4.2",
     "bn.js": "^4.11.9"
   }
 }
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index ad027b3de95c..88be85c110d7 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -3,7 +3,6 @@
   "version": "3.5.2-15",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
-  "module": "index.mjs",
   "sideEffects": false,
   "author": "Jaco Greeff <jacogr@gmail.com>",
   "maintainers": [],
@@ -17,13 +16,13 @@
     "@polkadot/api": "3.5.2-15",
     "@polkadot/rpc-core": "3.5.2-15",
     "@polkadot/types": "3.5.2-15",
-    "@polkadot/util": "^5.4.1",
-    "@polkadot/util-crypto": "^5.4.1",
-    "@polkadot/x-rxjs": "5.4.1",
+    "@polkadot/util": "^5.4.2",
+    "@polkadot/util-crypto": "^5.4.2",
+    "@polkadot/x-rxjs": "^5.4.2",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^5.4.1",
+    "@polkadot/keyring": "^5.4.2",
     "@polkadot/rpc-provider": "3.5.2-15"
   }
 }
diff --git a/packages/api/package.json b/packages/api/package.json
index 097deae2559f..dd3c6ada58b5 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -3,7 +3,6 @@
   "version": "3.5.2-15",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
-  "module": "index.mjs",
   "sideEffects": [
     "./detectPackage.js",
     "./detectPackage.mjs"
@@ -18,15 +17,15 @@
   "dependencies": {
     "@babel/runtime": "^7.12.5",
     "@polkadot/api-derive": "3.5.2-15",
-    "@polkadot/keyring": "^5.4.1",
+    "@polkadot/keyring": "^5.4.2",
     "@polkadot/metadata": "3.5.2-15",
     "@polkadot/rpc-core": "3.5.2-15",
     "@polkadot/rpc-provider": "3.5.2-15",
     "@polkadot/types": "3.5.2-15",
     "@polkadot/types-known": "3.5.2-15",
-    "@polkadot/util": "^5.4.1",
-    "@polkadot/util-crypto": "^5.4.1",
-    "@polkadot/x-rxjs": "5.4.1",
+    "@polkadot/util": "^5.4.2",
+    "@polkadot/util-crypto": "^5.4.2",
+    "@polkadot/x-rxjs": "^5.4.2",
     "bn.js": "^4.11.9",
     "eventemitter3": "^4.0.7"
   }
diff --git a/packages/metadata/package.json b/packages/metadata/package.json
index 07b6bd37c346..fc287bd6ef04 100644
--- a/packages/metadata/package.json
+++ b/packages/metadata/package.json
@@ -3,7 +3,6 @@
   "version": "3.5.2-15",
   "description": "Helpers to extract information from runtime metadata",
   "main": "index.js",
-  "module": "index.mjs",
   "sideEffects": [
     "./detectPackage.js",
     "./detectPackage.mjs"
@@ -19,11 +18,11 @@
     "@babel/runtime": "^7.12.5",
     "@polkadot/types": "3.5.2-15",
     "@polkadot/types-known": "3.5.2-15",
-    "@polkadot/util": "^5.4.1",
-    "@polkadot/util-crypto": "^5.4.1",
+    "@polkadot/util": "^5.4.2",
+    "@polkadot/util-crypto": "^5.4.2",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^5.4.1"
+    "@polkadot/keyring": "^5.4.2"
   }
 }
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 33143cdd4c32..84d5642c0dba 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -3,7 +3,6 @@
   "version": "3.5.2-15",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
-  "module": "index.mjs",
   "sideEffects": false,
   "author": "Jaco Greeff <jacogr@gmail.com>",
   "maintainers": [],
@@ -17,10 +16,10 @@
     "@polkadot/metadata": "3.5.2-15",
     "@polkadot/rpc-provider": "3.5.2-15",
     "@polkadot/types": "3.5.2-15",
-    "@polkadot/util": "^5.4.1",
-    "@polkadot/x-rxjs": "5.4.1"
+    "@polkadot/util": "^5.4.2",
+    "@polkadot/x-rxjs": "^5.4.2"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^5.4.1"
+    "@polkadot/keyring": "^5.4.2"
   }
 }
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index 6b857e6981a1..2957d15f6352 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -3,7 +3,6 @@
   "version": "3.5.2-15",
   "description": "Transport providers for the API",
   "main": "index.js",
-  "module": "index.mjs",
   "sideEffects": false,
   "author": "Jaco Greeff <jacogr@gmail.com>",
   "maintainers": [],
@@ -15,15 +14,15 @@
   "dependencies": {
     "@babel/runtime": "^7.12.5",
     "@polkadot/types": "3.5.2-15",
-    "@polkadot/util": "^5.4.1",
-    "@polkadot/util-crypto": "^5.4.1",
-    "@polkadot/x-fetch": "^5.4.1",
-    "@polkadot/x-ws": "^5.4.1",
+    "@polkadot/util": "^5.4.2",
+    "@polkadot/util-crypto": "^5.4.2",
+    "@polkadot/x-fetch": "^5.4.2",
+    "@polkadot/x-ws": "^5.4.2",
     "bn.js": "^4.11.9",
     "eventemitter3": "^4.0.7"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^5.4.1",
+    "@polkadot/keyring": "^5.4.2",
     "@polkadot/metadata": "3.5.2-15",
     "mock-socket": "^9.0.3",
     "nock": "^13.0.6"
diff --git a/packages/typegen/package.json b/packages/typegen/package.json
index b3c2e70621dc..66d8f7f72a19 100644
--- a/packages/typegen/package.json
+++ b/packages/typegen/package.json
@@ -3,7 +3,6 @@
   "version": "3.5.2-15",
   "description": "Type generation scripts",
   "main": "index.js",
-  "module": "index.mjs",
   "sideEffects": false,
   "bin": {
     "polkadot-types-chain-info": "./scripts/polkadot-types-chain-info.js",
@@ -27,7 +26,7 @@
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     "@polkadot/rpc-provider": "3.5.2-15",
     "@polkadot/types": "3.5.2-15",
-    "@polkadot/util": "^5.4.1",
+    "@polkadot/util": "^5.4.2",
     "handlebars": "^4.7.6",
     "websocket": "^1.0.33",
     "yargs": "^16.2.0"
diff --git a/packages/types-known/package.json b/packages/types-known/package.json
index 532077e3cfaa..35409efb4948 100644
--- a/packages/types-known/package.json
+++ b/packages/types-known/package.json
@@ -3,7 +3,6 @@
   "version": "3.5.2-15",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
-  "module": "index.mjs",
   "sideEffects": false,
   "author": "Jaco Greeff <jacogr@gmail.com>",
   "maintainers": [],
@@ -15,7 +14,7 @@
   "dependencies": {
     "@babel/runtime": "^7.12.5",
     "@polkadot/types": "3.5.2-15",
-    "@polkadot/util": "^5.4.1",
+    "@polkadot/util": "^5.4.2",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
diff --git a/packages/types/package.json b/packages/types/package.json
index 8e61f69ad6f9..20d657db31bc 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -3,7 +3,6 @@
   "version": "3.5.2-15",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
-  "module": "index.mjs",
   "sideEffects": [
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     "./detectPackage.mjs"
@@ -18,13 +17,13 @@
   "dependencies": {
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     "@polkadot/metadata": "3.5.2-15",
-    "@polkadot/util": "^5.4.1",
-    "@polkadot/util-crypto": "^5.4.1",
-    "@polkadot/x-rxjs": "5.4.1",
+    "@polkadot/util": "^5.4.2",
+    "@polkadot/util-crypto": "^5.4.2",
+    "@polkadot/x-rxjs": "^5.4.2",
     "@types/bn.js": "^4.11.6",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^5.4.1"
+    "@polkadot/keyring": "^5.4.2"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 62bfee5fa3cb..0c1a2bc43959 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1624,8 +1624,8 @@ __metadata:
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     "@polkadot/api": 3.5.2-15
     "@polkadot/types": 3.5.2-15
-    "@polkadot/util": ^5.4.1
-    "@polkadot/x-rxjs": 5.4.1
+    "@polkadot/util": ^5.4.2
+    "@polkadot/x-rxjs": ^5.4.2
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
@@ -1636,13 +1636,13 @@ __metadata:
   dependencies:
     "@babel/runtime": ^7.12.5
     "@polkadot/api": 3.5.2-15
-    "@polkadot/keyring": ^5.4.1
+    "@polkadot/keyring": ^5.4.2
     "@polkadot/rpc-core": 3.5.2-15
     "@polkadot/rpc-provider": 3.5.2-15
     "@polkadot/types": 3.5.2-15
-    "@polkadot/util": ^5.4.1
-    "@polkadot/util-crypto": ^5.4.1
-    "@polkadot/x-rxjs": 5.4.1
+    "@polkadot/util": ^5.4.2
+    "@polkadot/util-crypto": ^5.4.2
+    "@polkadot/x-rxjs": ^5.4.2
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
@@ -1653,15 +1653,15 @@ __metadata:
   dependencies:
     "@babel/runtime": ^7.12.5
     "@polkadot/api-derive": 3.5.2-15
-    "@polkadot/keyring": ^5.4.1
+    "@polkadot/keyring": ^5.4.2
     "@polkadot/metadata": 3.5.2-15
     "@polkadot/rpc-core": 3.5.2-15
     "@polkadot/rpc-provider": 3.5.2-15
     "@polkadot/types": 3.5.2-15
     "@polkadot/types-known": 3.5.2-15
-    "@polkadot/util": ^5.4.1
-    "@polkadot/util-crypto": ^5.4.1
-    "@polkadot/x-rxjs": 5.4.1
+    "@polkadot/util": ^5.4.2
+    "@polkadot/util-crypto": ^5.4.2
+    "@polkadot/x-rxjs": ^5.4.2
     bn.js: ^4.11.9
     eventemitter3: ^4.0.7
   languageName: unknown
@@ -1758,17 +1758,17 @@ __metadata:
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   linkType: hard
 
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-  version: 5.4.1
-  resolution: "@polkadot/keyring@npm:5.4.1"
+"@polkadot/keyring@npm:^5.4.2":
+  version: 5.4.2
+  resolution: "@polkadot/keyring@npm:5.4.2"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/util": 5.4.1
-    "@polkadot/util-crypto": 5.4.1
+    "@polkadot/util": 5.4.2
+    "@polkadot/util-crypto": 5.4.2
   peerDependencies:
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-    "@polkadot/util-crypto": 5.4.1
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+    "@polkadot/util": 5.4.2
+    "@polkadot/util-crypto": 5.4.2
+  checksum: 9f68a3606809df329506aa4df7da286a755c47e961268d406a6e2d226cb8cb95aa444c2043e1aeb55ff75766c3385d5c6e588535b5633b4b262d36ce33034d44
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@@ -1777,21 +1777,21 @@ __metadata:
   resolution: "@polkadot/metadata@workspace:packages/metadata"
   dependencies:
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-    "@polkadot/keyring": ^5.4.1
+    "@polkadot/keyring": ^5.4.2
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     "@polkadot/types-known": 3.5.2-15
-    "@polkadot/util": ^5.4.1
-    "@polkadot/util-crypto": ^5.4.1
+    "@polkadot/util": ^5.4.2
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   linkType: soft
 
-"@polkadot/networks@npm:5.4.1":
-  version: 5.4.1
-  resolution: "@polkadot/networks@npm:5.4.1"
+"@polkadot/networks@npm:5.4.2":
+  version: 5.4.2
+  resolution: "@polkadot/networks@npm:5.4.2"
   dependencies:
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-  checksum: eb408c956c45d8f0b9808e5507a9d82baacf0a266545eb3aaa8ac41b4821497c257f062a4f7235ea39ef6aa911d0bbfadffc510c920c76e5dc49f290a2fcd50a
+  checksum: 4bc40a3925364e9f95c1cecfd3ac82b50cf50fafee2a8ba2d535099500822812dfc3c8ba31dc43c11fe992f5aec93afabd5bd0863e610faef0e1bd86d45f7c46
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@@ -1800,12 +1800,12 @@ __metadata:
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   dependencies:
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-    "@polkadot/keyring": ^5.4.1
+    "@polkadot/keyring": ^5.4.2
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     "@polkadot/rpc-provider": 3.5.2-15
     "@polkadot/types": 3.5.2-15
-    "@polkadot/util": ^5.4.1
-    "@polkadot/x-rxjs": 5.4.1
+    "@polkadot/util": ^5.4.2
+    "@polkadot/x-rxjs": ^5.4.2
   languageName: unknown
   linkType: soft
 
@@ -1814,13 +1814,13 @@ __metadata:
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   dependencies:
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-    "@polkadot/keyring": ^5.4.1
+    "@polkadot/keyring": ^5.4.2
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     "@polkadot/types": 3.5.2-15
-    "@polkadot/util": ^5.4.1
-    "@polkadot/util-crypto": ^5.4.1
-    "@polkadot/x-fetch": ^5.4.1
-    "@polkadot/x-ws": ^5.4.1
+    "@polkadot/util": ^5.4.2
+    "@polkadot/util-crypto": ^5.4.2
+    "@polkadot/x-fetch": ^5.4.2
+    "@polkadot/x-ws": ^5.4.2
     bn.js: ^4.11.9
     eventemitter3: ^4.0.7
     mock-socket: ^9.0.3
@@ -1848,7 +1848,7 @@ __metadata:
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     "@polkadot/rpc-provider": 3.5.2-15
     "@polkadot/types": 3.5.2-15
-    "@polkadot/util": ^5.4.1
+    "@polkadot/util": ^5.4.2
     "@types/websocket": ^1.0.1
     "@types/yargs": ^15.0.12
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@@ -1869,7 +1869,7 @@ __metadata:
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@@ -1880,25 +1880,25 @@ __metadata:
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   dependencies:
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-    "@polkadot/keyring": ^5.4.1
+    "@polkadot/keyring": ^5.4.2
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-    "@polkadot/util": ^5.4.1
-    "@polkadot/util-crypto": ^5.4.1
-    "@polkadot/x-rxjs": 5.4.1
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+    "@polkadot/util-crypto": ^5.4.2
+    "@polkadot/x-rxjs": ^5.4.2
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     bn.js: ^4.11.9
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   linkType: soft
 
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-  resolution: "@polkadot/util-crypto@npm:5.4.1"
+"@polkadot/util-crypto@npm:5.4.2, @polkadot/util-crypto@npm:^5.4.2":
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+  resolution: "@polkadot/util-crypto@npm:5.4.2"
   dependencies:
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-    "@polkadot/networks": 5.4.1
-    "@polkadot/util": 5.4.1
-    "@polkadot/wasm-crypto": ^3.2.1
-    "@polkadot/x-randomvalues": 5.4.1
+    "@polkadot/networks": 5.4.2
+    "@polkadot/util": 5.4.2
+    "@polkadot/wasm-crypto": ^3.2.2
+    "@polkadot/x-randomvalues": 5.4.2
     base-x: ^3.0.8
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@@ -1910,114 +1910,114 @@ __metadata:
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     xxhashjs: ^0.2.2
   peerDependencies:
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-  checksum: 8c69e90c945164d510b310e428f79afed3a6ddd2d3132762fc4021239ee61c125bf30e84b008b580515a79e42bfdbcd3dfbb974da34633418157af71f5184c15
+    "@polkadot/util": 5.4.2
+  checksum: d1f5b2f77f5da524039c8e3b15cb90c2d1c0d8f284db4833e4f202c7ea0b2c74553052f96dea30e3c8d91bcf6b30f4e25fe90dbe17d044a861d082363754201e
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-"@polkadot/util@npm:5.4.1, @polkadot/util@npm:^5.4.1":
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-  resolution: "@polkadot/util@npm:5.4.1"
+"@polkadot/util@npm:5.4.2, @polkadot/util@npm:^5.4.2":
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+  resolution: "@polkadot/util@npm:5.4.2"
   dependencies:
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-    "@polkadot/x-textdecoder": 5.4.1
-    "@polkadot/x-textencoder": 5.4.1
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+  checksum: ebc157c8cada88719dd8f78977de3186da55232be886159473c6395a9d6619115e6abd1655c6e62f5412f2abb9cc0db99bce7c8872dfc568275472cbd2b46a58
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-"@polkadot/wasm-crypto-asmjs@npm:^3.2.1":
-  version: 3.2.1
-  resolution: "@polkadot/wasm-crypto-asmjs@npm:3.2.1"
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