diff --git a/README.md b/README.md
index 70f0ee1..f52b41e 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,6 @@ HSTK Token is an ERC20-compliant token implementation built on the Ethereum bloc
 ## Security Considerations
 
 1. **Access Control**
-   - All administrative functions are restricted to the multisig wallet
    - Blacklisting provides additional control over token movement
 
 2. **Supply Management**
diff --git a/solidity/foundry.toml b/solidity/foundry.toml
index 2466663..7722963 100644
--- a/solidity/foundry.toml
+++ b/solidity/foundry.toml
@@ -2,6 +2,7 @@
 src = "src"
 out = "out"
 libs = ["lib"]
+solc = ["0.8.28"]
 
 gas_reports = ["*"]
 no_test = true
diff --git a/solidity/script/HSTK.s.sol b/solidity/script/HSTK.s.sol
index e31cd4a..c73939f 100644
--- a/solidity/script/HSTK.s.sol
+++ b/solidity/script/HSTK.s.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+pragma solidity 0.8.4;
 
 import {Script, console} from "forge-std/Script.sol";
 import {MultiSigWallet} from "../src/MultiSigWallet.sol";
diff --git a/solidity/script/claimable.s.sol b/solidity/script/claimable.s.sol
index 50e9d62..2a46ba6 100644
--- a/solidity/script/claimable.s.sol
+++ b/solidity/script/claimable.s.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+pragma solidity ^0.8.4;
 
 import {Script, console} from "forge-std/Script.sol";
 import {Claimable} from "../src/Claimable2.sol";
diff --git a/solidity/src/AccessRegistry/AccessRegistry.sol b/solidity/src/AccessRegistry/AccessRegistry.sol
index 0b6754f..71b9b49 100644
--- a/solidity/src/AccessRegistry/AccessRegistry.sol
+++ b/solidity/src/AccessRegistry/AccessRegistry.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.20;
+pragma solidity 0.8.4;
 
 import {Context} from "@openzeppelin/contracts/utils/Context.sol";
 import {SuperAdmin2Step} from "./helpers/superAdmin2Step.sol";
diff --git a/solidity/src/AccessRegistry/helpers/fallbackAdmin2Step.sol b/solidity/src/AccessRegistry/helpers/fallbackAdmin2Step.sol
index 91d87b2..853754f 100644
--- a/solidity/src/AccessRegistry/helpers/fallbackAdmin2Step.sol
+++ b/solidity/src/AccessRegistry/helpers/fallbackAdmin2Step.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.4;
+pragma solidity 0.8.4;
 
 /// @notice Simple single fallbackAdmin authorization mixin.
 /// @author Hashstack
diff --git a/solidity/src/AccessRegistry/helpers/superAdmin2Step.sol b/solidity/src/AccessRegistry/helpers/superAdmin2Step.sol
index 93837be..d51f5de 100644
--- a/solidity/src/AccessRegistry/helpers/superAdmin2Step.sol
+++ b/solidity/src/AccessRegistry/helpers/superAdmin2Step.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.4;
+pragma solidity 0.8.4;
 
 /// @notice Simple single superAdmin authorization mixin.
 /// @author Hashstack
diff --git a/solidity/src/Claimable2.sol b/solidity/src/Claimable2.sol
index d57184f..8feb329 100644
--- a/solidity/src/Claimable2.sol
+++ b/solidity/src/Claimable2.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0
-pragma solidity >=0.8.4;
+pragma solidity 0.8.4;
 
 import {SafeMath} from "./utils/SafeMath.sol";
 import {IERC20} from "@openzeppelin/contracts/interfaces/IERC20.sol";
diff --git a/solidity/src/HSTK.sol b/solidity/src/HSTK.sol
index 32f6b90..175a8c9 100644
--- a/solidity/src/HSTK.sol
+++ b/solidity/src/HSTK.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.4;
+pragma solidity 0.8.4;
 
 import {Pausable} from "./utils/Pausable.sol";
 import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
diff --git a/solidity/src/MultiSigWallet.sol b/solidity/src/MultiSigWallet.sol
index d4fc669..cb5fe7e 100644
--- a/solidity/src/MultiSigWallet.sol
+++ b/solidity/src/MultiSigWallet.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.4;
+pragma solidity 0.8.4;
 
 import {AccessRegistry} from "./AccessRegistry/AccessRegistry.sol";
 import {UUPSUpgradeable} from "./utils/UUPSUpgradeable.sol";
diff --git a/solidity/src/utils/BlackListed.sol b/solidity/src/utils/BlackListed.sol
index 4456f72..1c0f945 100644
--- a/solidity/src/utils/BlackListed.sol
+++ b/solidity/src/utils/BlackListed.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.4;
+pragma solidity 0.8.4;
 
 import {Context} from "@openzeppelin/contracts/utils/Context.sol";
 
diff --git a/solidity/src/utils/Initializable.sol b/solidity/src/utils/Initializable.sol
index ad46956..40f8b9a 100644
--- a/solidity/src/utils/Initializable.sol
+++ b/solidity/src/utils/Initializable.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.4;
+pragma solidity 0.8.4;
 
 /// @notice Initializable mixin for the upgradeable contracts.
 abstract contract Initializable {
diff --git a/solidity/src/utils/Pausable.sol b/solidity/src/utils/Pausable.sol
index 1861442..6806125 100644
--- a/solidity/src/utils/Pausable.sol
+++ b/solidity/src/utils/Pausable.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
-
-pragma solidity ^0.8.20;
+pragma solidity 0.8.4;
 
 import {Context} from "@openzeppelin/contracts/utils/Context.sol";
 
diff --git a/solidity/src/utils/SafeMath.sol b/solidity/src/utils/SafeMath.sol
index faf8fe0..934528c 100644
--- a/solidity/src/utils/SafeMath.sol
+++ b/solidity/src/utils/SafeMath.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.4;
+pragma solidity 0.8.4;
 
 library SafeMath {
     function add(uint256 a, uint256 b) internal pure returns (uint256) {
diff --git a/solidity/src/utils/UUPSUpgradeable.sol b/solidity/src/utils/UUPSUpgradeable.sol
index db271d8..8825396 100644
--- a/solidity/src/utils/UUPSUpgradeable.sol
+++ b/solidity/src/utils/UUPSUpgradeable.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.4;
+pragma solidity 0.8.4;
 
 /// @dev Note:
 /// - This implementation is intended to be used with ERC1967 proxies.
diff --git a/solidity/test/Claimable.t.sol b/solidity/test/Claimable.t.sol
index 4165c93..b7024c0 100644
--- a/solidity/test/Claimable.t.sol
+++ b/solidity/test/Claimable.t.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+pragma solidity 0.8.4;
 
 import {Test, console} from "forge-std/Test.sol";
 import {Claimable} from "../src/Claimable2.sol";