diff --git a/contracts/ERC777BaseToken.sol b/contracts/ERC777BaseToken.sol
index 3e24835..a72c8de 100644
--- a/contracts/ERC777BaseToken.sol
+++ b/contracts/ERC777BaseToken.sol
@@ -1,7 +1,7 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-pragma solidity 0.4.24;
+pragma solidity ^0.4.24;
 
 import { ERC820Implementer } from "eip820/contracts/ERC820Implementer.sol";
 import { SafeMath } from "openzeppelin-solidity/contracts/math/SafeMath.sol";
diff --git a/contracts/ERC777ERC20BaseToken.sol b/contracts/ERC777ERC20BaseToken.sol
index 9b94140..c631eef 100644
--- a/contracts/ERC777ERC20BaseToken.sol
+++ b/contracts/ERC777ERC20BaseToken.sol
@@ -1,7 +1,7 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-pragma solidity 0.4.24;
+pragma solidity ^0.4.24;
 
 
 import { ERC20Token } from "./ERC20Token.sol";
diff --git a/contracts/examples/ExampleTokensRecipient.sol b/contracts/examples/ExampleTokensRecipient.sol
index a5a9093..b3b6e0a 100644
--- a/contracts/examples/ExampleTokensRecipient.sol
+++ b/contracts/examples/ExampleTokensRecipient.sol
@@ -5,7 +5,7 @@
  * This code has not been reviewed.
  * Do not use or deploy this code before reviewing it personally first.
  */
-pragma solidity 0.4.24;
+pragma solidity ^0.4.24;
 
 import { ERC820Implementer } from "eip820/contracts/ERC820Implementer.sol";
 import { ERC820ImplementerInterface } from "eip820/contracts/ERC820ImplementerInterface.sol";
diff --git a/contracts/examples/ExampleTokensSender.sol b/contracts/examples/ExampleTokensSender.sol
index 08446bf..01deffd 100644
--- a/contracts/examples/ExampleTokensSender.sol
+++ b/contracts/examples/ExampleTokensSender.sol
@@ -5,7 +5,7 @@
  * This code has not been reviewed.
  * Do not use or deploy this code before reviewing it personally first.
  */
-pragma solidity 0.4.24;
+pragma solidity ^0.4.24;
 
 import { ERC820Implementer } from "eip820/contracts/ERC820Implementer.sol";
 import { ERC820ImplementerInterface } from "eip820/contracts/ERC820ImplementerInterface.sol";
diff --git a/contracts/examples/ReferenceToken.sol b/contracts/examples/ReferenceToken.sol
index 78c047d..ca1510b 100644
--- a/contracts/examples/ReferenceToken.sol
+++ b/contracts/examples/ReferenceToken.sol
@@ -1,7 +1,7 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-pragma solidity 0.4.24;
+pragma solidity ^0.4.24;
 
 /// @title ERC777 ReferenceToken Contract
 /// @author Jordi Baylina, Jacques Dafflon