diff --git a/contracts/tge/HATAirdropFactory.sol b/contracts/tge/HATAirdropFactory.sol
index f4afc8af..0f317617 100644
--- a/contracts/tge/HATAirdropFactory.sol
+++ b/contracts/tge/HATAirdropFactory.sol
@@ -10,9 +10,6 @@ import "./HATAirdrop.sol";
 contract HATAirdropFactory is Ownable {
     using SafeERC20Upgradeable for IERC20Upgradeable;
 
-    address public implementation;
-
-    event ImplementationUpdated(address indexed _newImplementation);
     event TokensWithdrawn(address indexed _owner, uint256 _amount);
     event HATAirdropCreated(
         address indexed _hatAirdrop,
@@ -27,15 +24,6 @@ contract HATAirdropFactory is Ownable {
         ITokenLockFactory _tokenLockFactory
     );
 
-    constructor (address _implementation) {
-        implementation = _implementation;
-    }
-
-    function updateImplementation(address _newImplementation) external onlyOwner {
-        implementation = _newImplementation;
-        emit ImplementationUpdated(_newImplementation);
-    }
-
     function withdrawTokens(IERC20Upgradeable _token, uint256 _amount) external onlyOwner {
         address owner = owner();
         _token.safeTransfer(owner, _amount);
@@ -43,6 +31,7 @@ contract HATAirdropFactory is Ownable {
     }
 
     function createHATAirdrop(
+        address _implementation,
         string memory _merkleTreeIPFSRef,
         bytes32 _root,
         uint256 _startTime,
@@ -53,7 +42,7 @@ contract HATAirdropFactory is Ownable {
         IERC20Upgradeable _token,
         ITokenLockFactory _tokenLockFactory
     ) external onlyOwner returns (address result) {
-        result = Clones.cloneDeterministic(implementation, keccak256(abi.encodePacked(
+        result = Clones.cloneDeterministic(_implementation, keccak256(abi.encodePacked(
             _merkleTreeIPFSRef,
             _root,
             _startTime,
@@ -92,6 +81,7 @@ contract HATAirdropFactory is Ownable {
     }
 
     function predictHATAirdropAddress(
+        address _implementation,
         string memory _merkleTreeIPFSRef,
         bytes32 _root,
         uint256 _startTime,
@@ -101,7 +91,7 @@ contract HATAirdropFactory is Ownable {
         IERC20 _token,
         ITokenLockFactory _tokenLockFactory
     ) external view returns (address) {
-        return Clones.predictDeterministicAddress(implementation, keccak256(abi.encodePacked(
+        return Clones.predictDeterministicAddress(_implementation, keccak256(abi.encodePacked(
             _merkleTreeIPFSRef,
             _root,
             _startTime,
diff --git a/docs/dodoc/tge/HATAirdropFactory.md b/docs/dodoc/tge/HATAirdropFactory.md
index ee39fdde..72f2a72b 100644
--- a/docs/dodoc/tge/HATAirdropFactory.md
+++ b/docs/dodoc/tge/HATAirdropFactory.md
@@ -13,7 +13,7 @@
 ### createHATAirdrop
 
 ```solidity
-function createHATAirdrop(string _merkleTreeIPFSRef, bytes32 _root, uint256 _startTime, uint256 _deadline, uint256 _lockEndTime, uint256 _periods, uint256 _totalAmount, contract IERC20Upgradeable _token, contract ITokenLockFactory _tokenLockFactory) external nonpayable returns (address result)
+function createHATAirdrop(address _implementation, string _merkleTreeIPFSRef, bytes32 _root, uint256 _startTime, uint256 _deadline, uint256 _lockEndTime, uint256 _periods, uint256 _totalAmount, contract IERC20Upgradeable _token, contract ITokenLockFactory _tokenLockFactory) external nonpayable returns (address result)
 ```
 
 
@@ -24,6 +24,7 @@ function createHATAirdrop(string _merkleTreeIPFSRef, bytes32 _root, uint256 _sta
 
 | Name | Type | Description |
 |---|---|---|
+| _implementation | address | undefined |
 | _merkleTreeIPFSRef | string | undefined |
 | _root | bytes32 | undefined |
 | _startTime | uint256 | undefined |
@@ -40,23 +41,6 @@ function createHATAirdrop(string _merkleTreeIPFSRef, bytes32 _root, uint256 _sta
 |---|---|---|
 | result | address | undefined |
 
-### implementation
-
-```solidity
-function implementation() external view returns (address)
-```
-
-
-
-
-
-
-#### Returns
-
-| Name | Type | Description |
-|---|---|---|
-| _0 | address | undefined |
-
 ### owner
 
 ```solidity
@@ -77,7 +61,7 @@ function owner() external view returns (address)
 ### predictHATAirdropAddress
 
 ```solidity
-function predictHATAirdropAddress(string _merkleTreeIPFSRef, bytes32 _root, uint256 _startTime, uint256 _deadline, uint256 _lockEndTime, uint256 _periods, contract IERC20 _token, contract ITokenLockFactory _tokenLockFactory) external view returns (address)
+function predictHATAirdropAddress(address _implementation, string _merkleTreeIPFSRef, bytes32 _root, uint256 _startTime, uint256 _deadline, uint256 _lockEndTime, uint256 _periods, contract IERC20 _token, contract ITokenLockFactory _tokenLockFactory) external view returns (address)
 ```
 
 
@@ -88,6 +72,7 @@ function predictHATAirdropAddress(string _merkleTreeIPFSRef, bytes32 _root, uint
 
 | Name | Type | Description |
 |---|---|---|
+| _implementation | address | undefined |
 | _merkleTreeIPFSRef | string | undefined |
 | _root | bytes32 | undefined |
 | _startTime | uint256 | undefined |
@@ -130,22 +115,6 @@ function transferOwnership(address newOwner) external nonpayable
 |---|---|---|
 | newOwner | address | undefined |
 
-### updateImplementation
-
-```solidity
-function updateImplementation(address _newImplementation) external nonpayable
-```
-
-
-
-
-
-#### Parameters
-
-| Name | Type | Description |
-|---|---|---|
-| _newImplementation | address | undefined |
-
 ### withdrawTokens
 
 ```solidity
@@ -192,22 +161,6 @@ event HATAirdropCreated(address indexed _hatAirdrop, string _merkleTreeIPFSRef,
 | _token  | contract IERC20Upgradeable | undefined |
 | _tokenLockFactory  | contract ITokenLockFactory | undefined |
 
-### ImplementationUpdated
-
-```solidity
-event ImplementationUpdated(address indexed _newImplementation)
-```
-
-
-
-
-
-#### Parameters
-
-| Name | Type | Description |
-|---|---|---|
-| _newImplementation `indexed` | address | undefined |
-
 ### OwnershipTransferred
 
 ```solidity
diff --git a/test/tge/hatairdrop.js b/test/tge/hatairdrop.js
index eba6b3e4..f22e7d0e 100644
--- a/test/tge/hatairdrop.js
+++ b/test/tge/hatairdrop.js
@@ -60,9 +60,10 @@ contract("HATAirdrop", (accounts) => {
     periods = 90;
 
     hatAirdropImplementation = await HATAirdrop.new();
-    hatAirdropFactory = await HATAirdropFactory.new(hatAirdropImplementation.address);
+    hatAirdropFactory = await HATAirdropFactory.new();
 
     let airdropAddress = await hatAirdropFactory.predictHATAirdropAddress(
+      hatAirdropImplementation.address,
       "QmSUXfYsk9HgrMBa7tgp3MBm8FGwDF9hnVaR9C1PMoFdS3",
       merkleTree.getHexRoot(),
       startTime,
@@ -74,6 +75,7 @@ contract("HATAirdrop", (accounts) => {
     );
 
     let tx = await hatAirdropFactory.createHATAirdrop(
+      hatAirdropImplementation.address,
       "QmSUXfYsk9HgrMBa7tgp3MBm8FGwDF9hnVaR9C1PMoFdS3",
       merkleTree.getHexRoot(),
       startTime,
@@ -101,31 +103,12 @@ contract("HATAirdrop", (accounts) => {
     await token.mint(hatAirdropFactory.address, totalAmount);
   }
 
-  it("Update implementation", async () => {
-    await setupHATAirdrop();
-
-    await assertFunctionRaisesException(
-      hatAirdropFactory.updateImplementation(
-        accounts[3],
-        { from: accounts[1] }
-      ),
-      "Ownable: caller is not the owner"
-    );
-
-    assert.equal(await hatAirdropFactory.implementation(), hatAirdropImplementation.address);
-
-    let tx = await hatAirdropFactory.updateImplementation(accounts[3]);
-    assert.equal(tx.logs[0].event, "ImplementationUpdated");
-    assert.equal(tx.logs[0].args._newImplementation, accounts[3]);
-
-    assert.equal(await hatAirdropFactory.implementation(), accounts[3]);
-  });
-
   it("Only owner can create airdrops", async () => {
     await setupHATAirdrop();
 
     await assertFunctionRaisesException(
       hatAirdropFactory.createHATAirdrop(
+        hatAirdropImplementation.address,
         "QmSUXfYsk9HgrMBa7tgp3MBm8FGwDF9hnVaR9C1PMoFdS3",
         merkleTree.getHexRoot(),
         startTime,