diff --git a/lerna.json b/lerna.json
index d1ff5d119..a89b342e5 100644
--- a/lerna.json
+++ b/lerna.json
@@ -10,5 +10,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "0.19.5"
+  "version": "0.19.6"
 }
diff --git a/package.json b/package.json
index cb394d957..271eb87b0 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.19.5",
+  "version": "0.19.6",
   "private": true,
   "workspaces": [
     "packages/*"
diff --git a/packages/util-crypto/docs/nacl.md b/packages/util-crypto/docs/nacl.md
index 7a69ad6a2..aa72b1176 100644
--- a/packages/util-crypto/docs/nacl.md
+++ b/packages/util-crypto/docs/nacl.md
@@ -12,11 +12,11 @@ Implements [NaCl](http://nacl.cr.yp.to/) secret-key authenticated encryption, pu
 Decrypts a message using the supplied secretKey and nonce 
 
 ```js
-naclDecrypt (message: Uint8Array, secretKey: Uint8Array, nonce: Uint8Array): Uint8Array
+naclDecrypt (message: Uint8Array, nonce: Uint8Array, secret: Uint8Array): Uint8Array
 ```
 
 
-Returns an decrypted message, using the `secretKey` and `nonce`.
+Returns an decrypted message, using the `secret` and `nonce`.
 
 ```js
 import { naclDecrypt } from '@polkadot/util-crypto';
@@ -29,7 +29,7 @@ naclDecrypt([...], [...], [...]) // => [...]
 Encrypts a message using the supplied secretKey and nonce 
 
 ```js
-naclEncrypt (message: Uint8Array, secretKey: Uint8Array, nonce?: Uint8Array): { encrypted: Uint8Array, nonce: Uint8Array }
+naclEncrypt (message: Uint8Array, secret: Uint8Array, nonce?: Uint8Array): { encrypted: Uint8Array, nonce: Uint8Array }
 ```
 
 
diff --git a/packages/util-crypto/package.json b/packages/util-crypto/package.json
index 584de3a28..d4c1960b2 100644
--- a/packages/util-crypto/package.json
+++ b/packages/util-crypto/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util-crypto",
-  "version": "0.19.5",
+  "version": "0.19.6",
   "description": "A collection of useful crypto utilities for @polkadot",
   "main": "index.js",
   "keywords": [
diff --git a/packages/util-keyring/package.json b/packages/util-keyring/package.json
index 40fa9d62b..499b66c9a 100644
--- a/packages/util-keyring/package.json
+++ b/packages/util-keyring/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util-keyring",
-  "version": "0.19.5",
+  "version": "0.19.6",
   "description": "Keyring management",
   "main": "index.js",
   "engines": {
@@ -31,8 +31,8 @@
     "test": "echo \"Tests only available from root wrapper\""
   },
   "dependencies": {
-    "@polkadot/util": "^0.19.5",
-    "@polkadot/util-crypto": "^0.19.5",
+    "@polkadot/util": "^0.19.6",
+    "@polkadot/util-crypto": "^0.19.6",
     "babel-runtime": "^6.26.0",
     "bs58": "^4.0.1"
   }
diff --git a/packages/util-rlp/package.json b/packages/util-rlp/package.json
index cb1d19f9d..0e876389b 100644
--- a/packages/util-rlp/package.json
+++ b/packages/util-rlp/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util-rlp",
-  "version": "0.19.5",
+  "version": "0.19.6",
   "description": "RLP encoding and decoding",
   "main": "index.js",
   "keywords": [
@@ -29,7 +29,7 @@
     "test": "echo \"Tests only available from root wrapper\""
   },
   "dependencies": {
-    "@polkadot/util": "^0.19.5",
+    "@polkadot/util": "^0.19.6",
     "babel-runtime": "^6.26.0"
   },
   "devDependencies": {
diff --git a/packages/util-triehash/package.json b/packages/util-triehash/package.json
index 6158af79f..a34c8fc4c 100644
--- a/packages/util-triehash/package.json
+++ b/packages/util-triehash/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util-triehash",
-  "version": "0.19.5",
+  "version": "0.19.6",
   "description": "Creation of triehash values",
   "main": "index.js",
   "keywords": [
@@ -29,9 +29,9 @@
     "test": "echo \"Tests only available from root wrapper\""
   },
   "dependencies": {
-    "@polkadot/util": "^0.19.5",
-    "@polkadot/util-crypto": "^0.19.5",
-    "@polkadot/util-rlp": "^0.19.5",
+    "@polkadot/util": "^0.19.6",
+    "@polkadot/util-crypto": "^0.19.6",
+    "@polkadot/util-rlp": "^0.19.6",
     "babel-runtime": "^6.26.0"
   }
 }
diff --git a/packages/util/docs/is.md b/packages/util/docs/is.md
index 0220507e5..d3be69bca 100644
--- a/packages/util/docs/is.md
+++ b/packages/util/docs/is.md
@@ -109,7 +109,7 @@ console.log('isFunction', isFunction(() => false)); // => true
 Tests for a hex string. 
 
 ```js
-isHex (value: string, bitLength: number = -1): boolean
+isHex (value: mixed, bitLength: number = -1): boolean
 ```
 
 
diff --git a/packages/util/package.json b/packages/util/package.json
index 1fb96003a..6f5a942fd 100644
--- a/packages/util/package.json
+++ b/packages/util/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util",
-  "version": "0.19.5",
+  "version": "0.19.6",
   "description": "A collection of useful utilities for @polkadot",
   "main": "index.js",
   "keywords": [