diff --git a/MigratableToken.sol b/MigratableToken.sol
index 5f3f5de..98d557e 100644
--- a/MigratableToken.sol
+++ b/MigratableToken.sol
@@ -17,7 +17,7 @@ contract MigrateAgent {
 }
 
 contract MigratableToken is Token {
-    
+
     MigrateAgent public migrateAgent;
 
     //Total migrated tokens
@@ -55,10 +55,10 @@ contract MigratableToken is Token {
         Set migrating agent and start migrating
     */
     function setMigrateAgent(MigrateAgent _agent)
-        external
-        onlyOwner
-        notZeroAddress(_agent)
-        afterCrowdsale
+    external
+    onlyOwner
+    notZeroAddress(_agent)
+    afterCrowdsale
     {
         //cannot interrupt migrating
         require(getMigrateState() != MigrateState.Migrating);
@@ -72,7 +72,7 @@ contract MigratableToken is Token {
         Migrating status
     */
     function getMigrateState() public constant returns (MigrateState) {
-        if (block.number <= ICO_END) {
+        if (block.number <= crowdsaleEndBlock) {
             //Migration is not allowed on funding
             return MigrateState.NotAllowed;
         } else if (address(migrateAgent) == address(0)) {
diff --git a/README.md b/README.md
index 8fb890e..c16178e 100644
--- a/README.md
+++ b/README.md
@@ -112,12 +112,18 @@ Total supply of tokens is 100 million.
 <br>
 <br>
 ```javascript
-    uint256 public constant ICO_END = 222222222;
+ uint256 public crowdsaleEndBlock = 222222222;
 ```
 A block number that indicates when the Crowdsale ends.
 <br>
 <br>
 ```javascript
+uint256 public constant crowdsaleMaxEndBlock = 444444444;
+```
+A block number that indicates the max possible end block number.
+<br>
+<br>
+```javascript
 mapping (address => uint256) balances;
 ```
 An array that saves balances of the users.
@@ -260,6 +266,18 @@ To decrease allowed value is better to use this function to avoid 2 calls (and w
 Allows trusted address burning a specific amount of his tokens. This function is intended to be called after the Crowdsale to burn the unsold tokens.
 <br>
 <br>
+```javascript
+    function updateCrowdsaleEndBlock (uint256 _crowdsaleEndBlock) {
+        //Crowdsale must be active
+        require(block.number <= crowdsaleEndBlock);
+        //Transfers can only be unlocked earlier
+        require(_crowdsaleEndBlock < crowdsaleMaxEndBlock);
+        crowdsaleEndBlock = _crowdsaleEndBlock;
+    }
+```
+Allows owner setting the new end block number to extend/close Crowdsale.
+<br>
+<br>
 ```javascript
 function transferOwnership(address _newOwner) public afterCrowdsale  {
     super.transferOwnership(_newOwner);
@@ -279,7 +297,7 @@ This function prohibits pausing the contract when the Crowdsale is active.
 #### **Modifiers**
 ```javascript
 modifier canTransferOnCrowdsale (address _address) {
-    if (block.number <= ICO_END) {
+    if (block.number <= crowdsaleEndBlock) {
         //Require the end of funding or msg.sender to be trusted
         require(trusted[_address]);
     }
@@ -291,7 +309,7 @@ Only trusted addresses can call functions that are marked with this modifier.
 <br>
 ```javascript
 modifier afterCrowdsale {
-    require(block.number > ICO_END);
+    require(block.number > crowdsaleEndBlock);
     _;
 }
 ```
@@ -1044,7 +1062,7 @@ Set a reference to the new Token. This is only possible when the migration has n
 <br>
 ```javascript
 function getMigrateState() public constant returns (MigrateState) {
-    if (block.number <= ICO_END) {
+    if (block.number <= crowdsaleEndBlock) {
         //Migration is not allowed on funding
         return MigrateState.NotAllowed;
     } else if (address(migrateAgent) == address(0)) {
diff --git a/Token.sol b/Token.sol
index d8449b8..1d1c46f 100644
--- a/Token.sol
+++ b/Token.sol
@@ -15,8 +15,10 @@ contract Token is ERC20, Pausable {
     //Total amount of Gee
     uint256 public _totalSupply = 100 * (10**6) * (10**8);
 
-    //Iend of crowdsale
-    uint256 public constant ICO_END = 222222222;
+    //end of crowdsale
+    uint256 public crowdsaleEndBlock = 222222222;
+    //end of crowdsale
+    uint256 public constant crowdsaleMaxEndBlock = 444444444;
 
     //Balances for each account
     mapping (address => uint256)  balances;
@@ -142,6 +144,14 @@ contract Token is ERC20, Pausable {
         return true;
     }
 
+    function updateCrowdsaleEndBlock (uint256 _crowdsaleEndBlock) {
+        //Crowdsale must be active
+        require(block.number <= crowdsaleEndBlock);
+        //Transfers can only be unlocked earlier
+        require(_crowdsaleEndBlock < crowdsaleMaxEndBlock);
+        crowdsaleEndBlock = _crowdsaleEndBlock;
+    }
+
     //Override transferOwnership()
     function transferOwnership(address _newOwner) public afterCrowdsale {
         super.transferOwnership(_newOwner);
@@ -153,7 +163,7 @@ contract Token is ERC20, Pausable {
     }
 
     modifier canTransferOnCrowdsale (address _address) {
-        if (block.number <= ICO_END) {
+        if (block.number <= crowdsaleEndBlock) {
             //Require the end of funding or msg.sender to be trusted
             require(trusted[_address]);
         }
@@ -162,7 +172,7 @@ contract Token is ERC20, Pausable {
 
     //Some functions should work only after the Crowdsale
     modifier afterCrowdsale {
-        require(block.number > ICO_END);
+        require(block.number > crowdsaleEndBlock);
         _;
     }