diff --git a/README.md b/README.md
index 33846c9..b588307 100644
--- a/README.md
+++ b/README.md
@@ -2,15 +2,17 @@
 
 This script allows to stake KSM via the Fireblocks system using the RAW signing API feature.
 
+## :warning: Breaking Change in 2.0.0 :warning:
+Version 2.0.0 introduces a breaking change; as per [this forum post](https://forum.polkadot.network/t/staking-controller-deprecation-plan-staking-ui-leads-comms/2748) on Polkadot - the controller is being deprecated.<br>
+As a result the following breaking changes were introduced:
+* The function `setController` will no longer work and will results in an error
+* The function `bond` no longer accepts 4 arguments, instead only 3 arguments - `vaultAccountId: string, amount?: number, rewardDestination?: string` (the `controller` argument was removed)
+
 **Prerequisites:**
 
 1. Run `npm i` from the project's directory to install all needed dependencies.
 
-2. Create the following vault accounts with KSM wallet within each:
-
-    a. Stash Account - holds the amount to stake
-
-    b. Controller Account - has the permissions to run nominations (should have balance of 25 KSM)
+2. Create a vault account with KSM wallet which will act as a stash and controller account
 
 3. Enable RAW signing feature by contacting Fireblocks's support team
 
@@ -28,9 +30,9 @@ This script allows to stake KSM via the Fireblocks system using the RAW signing
 
 **How to stake KSM**
 
-1. addProxy(<controller_account_vault_account_id>, <proxy_ksm_address>);
+1. addProxy(<stake_account_vault_account_id>, <proxy_ksm_address>);
 
-2. bond(<stash_account_vault_account_id>, <amount_to_stake>, <controller_account_address>, **optional** - <reward_destination>);
+2. bond(<stash_account_vault_account_id>, <amount_to_stake>, **optional** - <reward_destination>);
 
 reward_destination - Can be one of the following:
 
@@ -38,20 +40,18 @@ reward_destination - Can be one of the following:
 
     2. Staked - the rewards are sent back to the Stash and automatically bonded
 
-    3. Controller - the rewards are sent back to the Controller account
-
 **How to stake extra KSM**
 1. bondExtra(<stash_account_vault_account_id>, <amount_to_bond>)
 
 **How to stop staking**
 
-1. chill(<controller_account_vault_account_id>);
+1. chill(<stake_account_vault_account_id>);
 
-2. unbond(<controller_account_vault_account_id>, <amount_to_unbond>);
+2. unbond(<stake_account_vault_account_id>, <amount_to_unbond>);
 
-3. **7 days after** unbond() - withdrawUnbonded(<controller_account_vault_account_id>);
+3. **7 days after** unbond() - withdrawUnbonded(<stake_account_vault_account_id>);
 
-4. **Optional** - removeProxy(<controller_account_vault_account_id>, <proxy_ksm_address>);
+4. **Optional** - removeProxy(<stake_account_vault_account_id>, <proxy_ksm_address>);
 
 **How to change controller**
 
diff --git a/package.json b/package.json
index ffdde6a..c940f15 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ksm_staking",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "FB KSM Staking",
   "main": "index.js",
   "scripts": {
@@ -9,7 +9,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@polkadot/api": "6.3.1",
+    "@polkadot/api": "^10.9.1",
     "fireblocks-sdk": ">=1.7.1",
     "fs": "0.0.1-security",
     "path": "^0.12.7",
diff --git a/src/ksm-staker.ts b/src/ksm-staker.ts
index 0a134d1..f59bb63 100644
--- a/src/ksm-staker.ts
+++ b/src/ksm-staker.ts
@@ -28,23 +28,22 @@ export  class KSMStaker {
      * Bond an amount of KSM from the stash to the controller
      * @param vaultAccountId - Stash vault account ID
      * @param amount - the amount to bond
-     * @param controllerAddress - the controller's address
      * @param rewardDestination - rewards destination (Stash, Staked or Controller)
      */
 
-    async bond(vaultAccountId, amount?: number, controllerAddress?: string, rewardDestination?: string) {
+    async bond(vaultAccountId, amount?: number, rewardDestination?: string) {
         if(!amount) {
             const availableBalance = (await this.apiClient.getVaultAccountAsset(vaultAccountId, this.getAssetId())).available;
             amount = Number.parseFloat(availableBalance);
         } 
 
-        const txNote = controllerAddress ? `Bond ${amount} KSM to ${controllerAddress}` : `Bond ${amount} KSM`;
+        const txNote = `Bond ${amount} KSM`;
         console.log(txNote);
 
         await this.sendTransaction({
             vaultAccountId,
             params: [
-                'staking.bond', controllerAddress || await this.getPermanentAddress(vaultAccountId),
+                'staking.bond',
                 (amount * 1000000000000).toString(),
                 rewardDestination? rewardDestination: 'Stash'
             ],
@@ -120,8 +119,8 @@ export  class KSMStaker {
      * @param controllerAddress - new controller address
      */
     
-    async setController(vaultAccountId, controllerAddress){
-        await this.sendTransaction({params: ['staking.setController', controllerAddress], vaultAccountId, txNote: `Setting ${controllerAddress} as controller`})
+    async setController(vaultAccountId){
+        throw new Error("setController is no longer supported in DOT / KSM / WND, for more information see README.md")
     }
 }