diff --git a/contracts/CurioERC1155Wrapper.sol b/contracts/CurioERC1155Wrapper.sol
index f7e2df3..16965fa 100644
--- a/contracts/CurioERC1155Wrapper.sol
+++ b/contracts/CurioERC1155Wrapper.sol
@@ -3,7 +3,6 @@ pragma solidity ^0.8.17;
 
 import "./ERC1155.sol";
 import "./IMastersFedi.sol";
-import "./SafeMath.sol";
 import "./Address.sol";
 import "./IERC1155Metadata.sol";
 import "@openzeppelin/contracts/utils/Strings.sol"; 
@@ -11,7 +10,6 @@ import "@openzeppelin/contracts/utils/Base64.sol";
 import "@openzeppelin/contracts/access/Ownable.sol";
 
 contract CurioERC1155Wrapper is ERC1155, ERC1155Metadata_URI, Ownable {
-    using SafeMath for uint256;
     using Address for address;
 
     mapping (uint256 => address) public contracts;
@@ -104,7 +102,7 @@ contract CurioERC1155Wrapper is ERC1155, ERC1155Metadata_URI, Ownable {
         
         curio.transferFrom(msg.sender, address(this), _quantity);
 
-        balances[_id][msg.sender] = balances[_id][msg.sender].add(_quantity);
+        balances[_id][msg.sender] += _quantity;
 
         // mint
         emit TransferSingle(msg.sender, address(0), msg.sender, _id, _quantity);
@@ -139,7 +137,7 @@ contract CurioERC1155Wrapper is ERC1155, ERC1155Metadata_URI, Ownable {
 
             curio.transferFrom(msg.sender, address(this), _quantity);
 
-            balances[_id][msg.sender] = balances[_id][msg.sender].add(_quantity);
+            balances[_id][msg.sender] += _quantity;
 
             if (callerIsContract) {
                 _doSafeTransferAcceptanceCheck(msg.sender, msg.sender, msg.sender, _id, _quantity, '');
@@ -163,7 +161,7 @@ contract CurioERC1155Wrapper is ERC1155, ERC1155Metadata_URI, Ownable {
         IMastersFedi curio = IMastersFedi(tokenContract);
 
         require(balances[_id][msg.sender] >= _quantity, "insufficient balance");
-        balances[_id][msg.sender] = balances[_id][msg.sender].sub(_quantity);
+        balances[_id][msg.sender] -= _quantity;
 
         curio.transfer(msg.sender, _quantity);
 
@@ -188,7 +186,7 @@ contract CurioERC1155Wrapper is ERC1155, ERC1155Metadata_URI, Ownable {
             IMastersFedi curio = IMastersFedi(tokenContract);
 
             require(balances[_id][msg.sender] >= _quantity, "insufficient balance");
-            balances[_id][msg.sender] = balances[_id][msg.sender].sub(_quantity);
+            balances[_id][msg.sender] -= _quantity;
 
             curio.transfer(msg.sender, _quantity);
         }
diff --git a/contracts/ERC1155.sol b/contracts/ERC1155.sol
index a5a1559..56ee283 100644
--- a/contracts/ERC1155.sol
+++ b/contracts/ERC1155.sol
@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
 pragma solidity ^0.8.17;
 
-import "./SafeMath.sol";
 import "./Address.sol";
 import "./Common.sol";
 import "./IERC1155TokenReceiver.sol";
@@ -10,7 +9,6 @@ import "./IERC1155.sol";
 // A sample implementation of core ERC1155 function.
 contract ERC1155 is IERC1155, ERC165, CommonConstants
 {
-    using SafeMath for uint256;
     using Address for address;
 
     // id => (owner => balance)
@@ -69,10 +67,8 @@ contract ERC1155 is IERC1155, ERC165, CommonConstants
         require(_to != address(0x0), "_to must be non-zero.");
         require(_from == msg.sender || operatorApproval[_from][msg.sender] == true, "Need operator approval for 3rd party transfers.");
 
-        // SafeMath will throw with insuficient funds _from
-        // or if _id is not valid (balance will be 0)
-        balances[_id][_from] = balances[_id][_from].sub(_value);
-        balances[_id][_to]   = _value.add(balances[_id][_to]);
+        balances[_id][_from] -= _value;
+        balances[_id][_to] += _value;
 
         // MUST emit event
         emit TransferSingle(msg.sender, _from, _to, _id, _value);
@@ -111,10 +107,8 @@ contract ERC1155 is IERC1155, ERC165, CommonConstants
             uint256 id = _ids[i];
             uint256 value = _values[i];
 
-            // SafeMath will throw with insuficient funds _from
-            // or if _id is not valid (balance will be 0)
-            balances[id][_from] = balances[id][_from].sub(value);
-            balances[id][_to]   = value.add(balances[id][_to]);
+            balances[id][_from] -= value;
+            balances[id][_to] += value;
         }
 
         // Note: instead of the below batch versions of event and acceptance check you MAY have emitted a TransferSingle
diff --git a/contracts/SafeMath.sol b/contracts/SafeMath.sol
deleted file mode 100644
index ab225aa..0000000
--- a/contracts/SafeMath.sol
+++ /dev/null
@@ -1,53 +0,0 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
-pragma solidity ^0.8.17;
-
-
-/**
- * @title SafeMath
- * @dev Math operations with safety checks that throw on error
- */
-library SafeMath {
-
-    /**
-    * @dev Multiplies two numbers, throws on overflow.
-    */
-    function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
-        // Gas optimization: this is cheaper than asserting 'a' not being zero, but the
-        // benefit is lost if 'b' is also tested.
-        // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
-        if (a == 0) {
-            return 0;
-        }
-
-        c = a * b;
-        assert(c / a == b);
-        return c;
-    }
-
-    /**
-    * @dev Integer division of two numbers, truncating the quotient.
-    */
-    function div(uint256 a, uint256 b) internal pure returns (uint256) {
-        // assert(b > 0); // Solidity automatically throws when dividing by 0
-        // uint256 c = a / b;
-        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
-        return a / b;
-    }
-
-    /**
-    * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
-    */
-    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
-        assert(b <= a);
-        return a - b;
-    }
-
-    /**
-    * @dev Adds two numbers, throws on overflow.
-    */
-    function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
-        c = a + b;
-        assert(c >= a);
-        return c;
-    }
-}