diff --git a/contracts/WiiQareVoucherV1.sol b/contracts/WiiQareVoucherV1.sol
index 8a0638d..03e898d 100644
--- a/contracts/WiiQareVoucherV1.sol
+++ b/contracts/WiiQareVoucherV1.sol
@@ -17,19 +17,6 @@ contract WiiQareVoucherV1 is ERC721, Pausable, Ownable, ERC721Burnable {
     uint256 private _voucherID;
     //=============================================================================
 
-    //=============================================================================
-    //                              Structs
-    //=============================================================================
-    struct Voucher {
-        uint256 value;
-        string currencySymbol;
-        string ownerID;
-        string providerID;
-        string beneficiaryID;
-        string status;
-    }
-    //=============================================================================
-
     //=============================================================================
     //                              Mappings
     //=============================================================================
@@ -40,7 +27,7 @@ contract WiiQareVoucherV1 is ERC721, Pausable, Ownable, ERC721Burnable {
     //=============================================================================
     //                              Events
     //=============================================================================
-    event mintVoucherEvent(uint256 voucherID, SharedStructs.Voucher nftVoucer);
+    event mintVoucherEvent(uint256 voucherID, SharedStructs.Voucher nftVoucher);
     event transferVoucherEvent(uint256 voucherID, string ownerID);
     event splitVoucherEvent(
         uint256 voucherID,
@@ -48,12 +35,11 @@ contract WiiQareVoucherV1 is ERC721, Pausable, Ownable, ERC721Burnable {
         SharedStructs.Voucher secondVoucher
     );
     event alterVoucherEvent(uint256 voucherID, SharedStructs.Voucher voucher);
-    event burnVoucher(uint256 voucherID);
+    event burnVoucherEvent(uint256 voucherID);
 
     //=============================================================================
 
-    constructor() ERC721("WiiQareVoucherV1", "WiiQare") {
-        _voucherID = 0;
+     constructor() ERC721("WiiQareVoucherV1", "WiiQare") {
     }
 
     //=============================================================================
@@ -69,9 +55,9 @@ contract WiiQareVoucherV1 is ERC721, Pausable, Ownable, ERC721Burnable {
     ) public onlyOwner whenNotPaused {
         require(voucher.value > 0, "Value of voucher must be greater than 0");
         vouchers[_voucherID] = voucher;
-        _safeMint(msg.sender, _voucherID);
         emit mintVoucherEvent(_voucherID, voucher);
         _incrementVoucherID();
+        _safeMint(msg.sender, _voucherID);
     }
 
     /**
@@ -120,7 +106,7 @@ contract WiiQareVoucherV1 is ERC721, Pausable, Ownable, ERC721Burnable {
         );
         mintVoucher(firstVoucher);
         mintVoucher(secondVoucher);
-        _burn(voucherID);
+        _burnVoucher(voucherID);
         emit splitVoucherEvent(voucherID, firstVoucher, secondVoucher);
     }
 
@@ -128,20 +114,24 @@ contract WiiQareVoucherV1 is ERC721, Pausable, Ownable, ERC721Burnable {
      * Allows the contract owner to destroy a voucher when the contract is not paused
      * @param voucherID id of the target voucher
      */
-    function _burn(
-        uint256 voucherID
-    ) internal override(ERC721) whenNotPaused onlyOwner {
+    function _burnVoucher(uint256 voucherID) internal whenNotPaused onlyOwner {
+        require(ownerOf(voucherID) != address(0), "Voucher doesn't exist!");
         delete vouchers[voucherID];
         super._burn(voucherID);
-        emit burnVoucher(voucherID);
+        emit burnVoucherEvent(voucherID);
     }
 
     /**
      * Returns all the minted vouchers
      * @return Voucher[]
      */
-    function getAllVouchers() public view returns (SharedStructs.Voucher[] memory) {
-        SharedStructs.Voucher[] memory vouchersArray = new SharedStructs.Voucher[](_voucherID);
+    function getAllVouchers()
+        public
+        view
+        returns (SharedStructs.Voucher[] memory)
+    {
+        SharedStructs.Voucher[]
+            memory vouchersArray = new SharedStructs.Voucher[](_voucherID);
         require(vouchersArray.length > 0, "No vouchers have been minted!");
         for (uint256 index = 0; index < vouchersArray.length; index++) {
             vouchersArray[index] = vouchers[index];
@@ -166,24 +156,6 @@ contract WiiQareVoucherV1 is ERC721, Pausable, Ownable, ERC721Burnable {
         }
     }
 
-    /**
-     * Substracts 1 from the voucherID
-     */
-    function _decrementVoucherID() internal {
-        uint256 value = _voucherID;
-        require(value > 0, "Counter: decrement overflow");
-        unchecked {
-            _voucherID = _voucherID - 1;
-        }
-    }
-
-    /**
-     * Sets the voucherID to 0
-     */
-    function _resetVoucherID() internal onlyOwner {
-        _voucherID = 0;
-    }
-
     /**
      * Allows the contract owner to pause the execution of the contract
      */
diff --git a/package-lock.json b/package-lock.json
index bb680d4..59220f9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,16 +6,42 @@
     "": {
       "name": "hardhat-project",
       "dependencies": {
-        "@openzeppelin/contracts": "^4.8.2"
+        "@openzeppelin/contracts": "^4.9.3"
       },
       "devDependencies": {
         "@nomicfoundation/hardhat-network-helpers": "^1.0.8",
         "@nomicfoundation/hardhat-toolbox": "^2.0.2",
         "codecov": "^3.8.3",
-        "hardhat": "^2.13.0",
+        "hardhat": "^2.19.1",
         "solidity-coverage": "^0.8.2"
       }
     },
+    "node_modules/@chainsafe/as-sha256": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/@chainsafe/as-sha256/-/as-sha256-0.3.1.tgz",
+      "integrity": "sha512-hldFFYuf49ed7DAakWVXSJODuq3pzJEguD8tQ7h+sGkM18vja+OFoJI9krnGmgzyuZC2ETX0NOIcCTy31v2Mtg==",
+      "dev": true
+    },
+    "node_modules/@chainsafe/persistent-merkle-tree": {
+      "version": "0.4.2",
+      "resolved": "https://registry.npmjs.org/@chainsafe/persistent-merkle-tree/-/persistent-merkle-tree-0.4.2.tgz",
+      "integrity": "sha512-lLO3ihKPngXLTus/L7WHKaw9PnNJWizlOF1H9NNzHP6Xvh82vzg9F2bzkXhYIFshMZ2gTCEz8tq6STe7r5NDfQ==",
+      "dev": true,
+      "dependencies": {
+        "@chainsafe/as-sha256": "^0.3.1"
+      }
+    },
+    "node_modules/@chainsafe/ssz": {
+      "version": "0.9.4",
+      "resolved": "https://registry.npmjs.org/@chainsafe/ssz/-/ssz-0.9.4.tgz",
+      "integrity": "sha512-77Qtg2N1ayqs4Bg/wvnWfg5Bta7iy7IRh8XqXh7oNMeP2HBbBwx8m6yTpA8p0EHItWPEBkgZd5S5/LSlp3GXuQ==",
+      "dev": true,
+      "dependencies": {
+        "@chainsafe/as-sha256": "^0.3.1",
+        "@chainsafe/persistent-merkle-tree": "^0.4.2",
+        "case": "^1.6.3"
+      }
+    },
     "node_modules/@cspotcode/source-map-support": {
       "version": "0.8.1",
       "resolved": "https://registry.npmjs.org/@cspotcode/source-map-support/-/source-map-support-0.8.1.tgz",
@@ -161,7 +187,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/bytes": "^5.7.0",
         "@ethersproject/properties": "^5.7.0"
@@ -241,7 +266,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/abi": "^5.7.0",
         "@ethersproject/abstract-provider": "^5.7.0",
@@ -297,7 +321,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/abstract-signer": "^5.7.0",
         "@ethersproject/basex": "^5.7.0",
@@ -328,7 +351,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/abstract-signer": "^5.7.0",
         "@ethersproject/address": "^5.7.0",
@@ -415,7 +437,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/bytes": "^5.7.0",
         "@ethersproject/sha2": "^5.7.0"
@@ -455,7 +476,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/abstract-provider": "^5.7.0",
         "@ethersproject/abstract-signer": "^5.7.0",
@@ -494,7 +514,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/bytes": "^5.7.0",
         "@ethersproject/logger": "^5.7.0"
@@ -535,7 +554,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/bytes": "^5.7.0",
         "@ethersproject/logger": "^5.7.0",
@@ -581,7 +599,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/bignumber": "^5.7.0",
         "@ethersproject/bytes": "^5.7.0",
@@ -654,7 +671,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/bignumber": "^5.7.0",
         "@ethersproject/constants": "^5.7.0",
@@ -676,7 +692,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/abstract-provider": "^5.7.0",
         "@ethersproject/abstract-signer": "^5.7.0",
@@ -733,7 +748,6 @@
           "url": "https://www.buymeacoffee.com/ricmoo"
         }
       ],
-      "peer": true,
       "dependencies": {
         "@ethersproject/bytes": "^5.7.0",
         "@ethersproject/hash": "^5.7.0",
@@ -910,34 +924,36 @@
       }
     },
     "node_modules/@nomicfoundation/ethereumjs-block": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-block/-/ethereumjs-block-4.0.0.tgz",
-      "integrity": "sha512-bk8uP8VuexLgyIZAHExH1QEovqx0Lzhc9Ntm63nCRKLHXIZkobaFaeCVwTESV7YkPKUk7NiK11s8ryed4CS9yA==",
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-block/-/ethereumjs-block-5.0.2.tgz",
+      "integrity": "sha512-hSe6CuHI4SsSiWWjHDIzWhSiAVpzMUcDRpWYzN0T9l8/Rz7xNn3elwVOJ/tAyS0LqL6vitUD78Uk7lQDXZun7Q==",
       "dev": true,
       "dependencies": {
-        "@nomicfoundation/ethereumjs-common": "^3.0.0",
-        "@nomicfoundation/ethereumjs-rlp": "^4.0.0",
-        "@nomicfoundation/ethereumjs-trie": "^5.0.0",
-        "@nomicfoundation/ethereumjs-tx": "^4.0.0",
-        "@nomicfoundation/ethereumjs-util": "^8.0.0",
-        "ethereum-cryptography": "0.1.3"
+        "@nomicfoundation/ethereumjs-common": "4.0.2",
+        "@nomicfoundation/ethereumjs-rlp": "5.0.2",
+        "@nomicfoundation/ethereumjs-trie": "6.0.2",
+        "@nomicfoundation/ethereumjs-tx": "5.0.2",
+        "@nomicfoundation/ethereumjs-util": "9.0.2",
+        "ethereum-cryptography": "0.1.3",
+        "ethers": "^5.7.1"
       },
       "engines": {
         "node": ">=14"
       }
     },
     "node_modules/@nomicfoundation/ethereumjs-blockchain": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-blockchain/-/ethereumjs-blockchain-6.0.0.tgz",
-      "integrity": "sha512-pLFEoea6MWd81QQYSReLlLfH7N9v7lH66JC/NMPN848ySPPQA5renWnE7wPByfQFzNrPBuDDRFFULMDmj1C0xw==",
-      "dev": true,
-      "dependencies": {
-        "@nomicfoundation/ethereumjs-block": "^4.0.0",
-        "@nomicfoundation/ethereumjs-common": "^3.0.0",
-        "@nomicfoundation/ethereumjs-ethash": "^2.0.0",
-        "@nomicfoundation/ethereumjs-rlp": "^4.0.0",
-        "@nomicfoundation/ethereumjs-trie": "^5.0.0",
-        "@nomicfoundation/ethereumjs-util": "^8.0.0",
+      "version": "7.0.2",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-blockchain/-/ethereumjs-blockchain-7.0.2.tgz",
+      "integrity": "sha512-8UUsSXJs+MFfIIAKdh3cG16iNmWzWC/91P40sazNvrqhhdR/RtGDlFk2iFTGbBAZPs2+klZVzhRX8m2wvuvz3w==",
+      "dev": true,
+      "dependencies": {
+        "@nomicfoundation/ethereumjs-block": "5.0.2",
+        "@nomicfoundation/ethereumjs-common": "4.0.2",
+        "@nomicfoundation/ethereumjs-ethash": "3.0.2",
+        "@nomicfoundation/ethereumjs-rlp": "5.0.2",
+        "@nomicfoundation/ethereumjs-trie": "6.0.2",
+        "@nomicfoundation/ethereumjs-tx": "5.0.2",
+        "@nomicfoundation/ethereumjs-util": "9.0.2",
         "abstract-level": "^1.0.3",
         "debug": "^4.3.3",
         "ethereum-cryptography": "0.1.3",
@@ -950,24 +966,24 @@
       }
     },
     "node_modules/@nomicfoundation/ethereumjs-common": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-common/-/ethereumjs-common-3.0.0.tgz",
-      "integrity": "sha512-WS7qSshQfxoZOpHG/XqlHEGRG1zmyjYrvmATvc4c62+gZXgre1ymYP8ZNgx/3FyZY0TWe9OjFlKOfLqmgOeYwA==",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-common/-/ethereumjs-common-4.0.2.tgz",
+      "integrity": "sha512-I2WGP3HMGsOoycSdOTSqIaES0ughQTueOsddJ36aYVpI3SN8YSusgRFLwzDJwRFVIYDKx/iJz0sQ5kBHVgdDwg==",
       "dev": true,
       "dependencies": {
-        "@nomicfoundation/ethereumjs-util": "^8.0.0",
+        "@nomicfoundation/ethereumjs-util": "9.0.2",
         "crc-32": "^1.2.0"
       }
     },
     "node_modules/@nomicfoundation/ethereumjs-ethash": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-ethash/-/ethereumjs-ethash-2.0.0.tgz",
-      "integrity": "sha512-WpDvnRncfDUuXdsAXlI4lXbqUDOA+adYRQaEezIkxqDkc+LDyYDbd/xairmY98GnQzo1zIqsIL6GB5MoMSJDew==",
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-ethash/-/ethereumjs-ethash-3.0.2.tgz",
+      "integrity": "sha512-8PfoOQCcIcO9Pylq0Buijuq/O73tmMVURK0OqdjhwqcGHYC2PwhbajDh7GZ55ekB0Px197ajK3PQhpKoiI/UPg==",
       "dev": true,
       "dependencies": {
-        "@nomicfoundation/ethereumjs-block": "^4.0.0",
-        "@nomicfoundation/ethereumjs-rlp": "^4.0.0",
-        "@nomicfoundation/ethereumjs-util": "^8.0.0",
+        "@nomicfoundation/ethereumjs-block": "5.0.2",
+        "@nomicfoundation/ethereumjs-rlp": "5.0.2",
+        "@nomicfoundation/ethereumjs-util": "9.0.2",
         "abstract-level": "^1.0.3",
         "bigint-crypto-utils": "^3.0.23",
         "ethereum-cryptography": "0.1.3"
@@ -977,15 +993,15 @@
       }
     },
     "node_modules/@nomicfoundation/ethereumjs-evm": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-evm/-/ethereumjs-evm-1.0.0.tgz",
-      "integrity": "sha512-hVS6qRo3V1PLKCO210UfcEQHvlG7GqR8iFzp0yyjTg2TmJQizcChKgWo8KFsdMw6AyoLgLhHGHw4HdlP8a4i+Q==",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-evm/-/ethereumjs-evm-2.0.2.tgz",
+      "integrity": "sha512-rBLcUaUfANJxyOx9HIdMX6uXGin6lANCulIm/pjMgRqfiCRMZie3WKYxTSd8ZE/d+qT+zTedBF4+VHTdTSePmQ==",
       "dev": true,
       "dependencies": {
-        "@nomicfoundation/ethereumjs-common": "^3.0.0",
-        "@nomicfoundation/ethereumjs-util": "^8.0.0",
-        "@types/async-eventemitter": "^0.2.1",
-        "async-eventemitter": "^0.2.4",
+        "@ethersproject/providers": "^5.7.1",
+        "@nomicfoundation/ethereumjs-common": "4.0.2",
+        "@nomicfoundation/ethereumjs-tx": "5.0.2",
+        "@nomicfoundation/ethereumjs-util": "9.0.2",
         "debug": "^4.3.3",
         "ethereum-cryptography": "0.1.3",
         "mcl-wasm": "^0.7.1",
@@ -996,9 +1012,9 @@
       }
     },
     "node_modules/@nomicfoundation/ethereumjs-rlp": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-rlp/-/ethereumjs-rlp-4.0.0.tgz",
-      "integrity": "sha512-GaSOGk5QbUk4eBP5qFbpXoZoZUj/NrW7MRa0tKY4Ew4c2HAS0GXArEMAamtFrkazp0BO4K5p2ZCG3b2FmbShmw==",
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-rlp/-/ethereumjs-rlp-5.0.2.tgz",
+      "integrity": "sha512-QwmemBc+MMsHJ1P1QvPl8R8p2aPvvVcKBbvHnQOKBpBztEo0omN0eaob6FeZS/e3y9NSe+mfu3nNFBHszqkjTA==",
       "dev": true,
       "bin": {
         "rlp": "bin/rlp"
@@ -1008,28 +1024,28 @@
       }
     },
     "node_modules/@nomicfoundation/ethereumjs-statemanager": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-statemanager/-/ethereumjs-statemanager-1.0.0.tgz",
-      "integrity": "sha512-jCtqFjcd2QejtuAMjQzbil/4NHf5aAWxUc+CvS0JclQpl+7M0bxMofR2AJdtz+P3u0ke2euhYREDiE7iSO31vQ==",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-statemanager/-/ethereumjs-statemanager-2.0.2.tgz",
+      "integrity": "sha512-dlKy5dIXLuDubx8Z74sipciZnJTRSV/uHG48RSijhgm1V7eXYFC567xgKtsKiVZB1ViTP9iFL4B6Je0xD6X2OA==",
       "dev": true,
       "dependencies": {
-        "@nomicfoundation/ethereumjs-common": "^3.0.0",
-        "@nomicfoundation/ethereumjs-rlp": "^4.0.0",
-        "@nomicfoundation/ethereumjs-trie": "^5.0.0",
-        "@nomicfoundation/ethereumjs-util": "^8.0.0",
+        "@nomicfoundation/ethereumjs-common": "4.0.2",
+        "@nomicfoundation/ethereumjs-rlp": "5.0.2",
         "debug": "^4.3.3",
         "ethereum-cryptography": "0.1.3",
-        "functional-red-black-tree": "^1.0.1"
+        "ethers": "^5.7.1",
+        "js-sdsl": "^4.1.4"
       }
     },
     "node_modules/@nomicfoundation/ethereumjs-trie": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-trie/-/ethereumjs-trie-5.0.0.tgz",
-      "integrity": "sha512-LIj5XdE+s+t6WSuq/ttegJzZ1vliwg6wlb+Y9f4RlBpuK35B9K02bO7xU+E6Rgg9RGptkWd6TVLdedTI4eNc2A==",
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-trie/-/ethereumjs-trie-6.0.2.tgz",
+      "integrity": "sha512-yw8vg9hBeLYk4YNg5MrSJ5H55TLOv2FSWUTROtDtTMMmDGROsAu+0tBjiNGTnKRi400M6cEzoFfa89Fc5k8NTQ==",
       "dev": true,
       "dependencies": {
-        "@nomicfoundation/ethereumjs-rlp": "^4.0.0",
-        "@nomicfoundation/ethereumjs-util": "^8.0.0",
+        "@nomicfoundation/ethereumjs-rlp": "5.0.2",
+        "@nomicfoundation/ethereumjs-util": "9.0.2",
+        "@types/readable-stream": "^2.3.13",
         "ethereum-cryptography": "0.1.3",
         "readable-stream": "^3.6.0"
       },
@@ -1038,14 +1054,16 @@
       }
     },
     "node_modules/@nomicfoundation/ethereumjs-tx": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-tx/-/ethereumjs-tx-4.0.0.tgz",
-      "integrity": "sha512-Gg3Lir2lNUck43Kp/3x6TfBNwcWC9Z1wYue9Nz3v4xjdcv6oDW9QSMJxqsKw9QEGoBBZ+gqwpW7+F05/rs/g1w==",
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+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-tx/-/ethereumjs-tx-5.0.2.tgz",
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+          "resolved": "https://registry.npmjs.org/@chainsafe/ssz/-/ssz-0.10.2.tgz",
+          "integrity": "sha512-/NL3Lh8K+0q7A3LsiFq09YXS9fPE+ead2rr7vM2QK8PLzrNsw3uqrif9bpRX5UxgeRjM+vYi+boCM3+GM4ovXg==",
+          "dev": true,
+          "requires": {
+            "@chainsafe/as-sha256": "^0.3.1",
+            "@chainsafe/persistent-merkle-tree": "^0.5.0"
+          }
+        }
       }
     },
     "@nomicfoundation/ethereumjs-vm": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-vm/-/ethereumjs-vm-6.0.0.tgz",
-      "integrity": "sha512-JMPxvPQ3fzD063Sg3Tp+UdwUkVxMoo1uML6KSzFhMH3hoQi/LMuXBoEHAoW83/vyNS9BxEe6jm6LmT5xdeEJ6w==",
-      "dev": true,
-      "requires": {
-        "@nomicfoundation/ethereumjs-block": "^4.0.0",
-        "@nomicfoundation/ethereumjs-blockchain": "^6.0.0",
-        "@nomicfoundation/ethereumjs-common": "^3.0.0",
-        "@nomicfoundation/ethereumjs-evm": "^1.0.0",
-        "@nomicfoundation/ethereumjs-rlp": "^4.0.0",
-        "@nomicfoundation/ethereumjs-statemanager": "^1.0.0",
-        "@nomicfoundation/ethereumjs-trie": "^5.0.0",
-        "@nomicfoundation/ethereumjs-tx": "^4.0.0",
-        "@nomicfoundation/ethereumjs-util": "^8.0.0",
-        "@types/async-eventemitter": "^0.2.1",
-        "async-eventemitter": "^0.2.4",
+      "version": "7.0.2",
+      "resolved": "https://registry.npmjs.org/@nomicfoundation/ethereumjs-vm/-/ethereumjs-vm-7.0.2.tgz",
+      "integrity": "sha512-Bj3KZT64j54Tcwr7Qm/0jkeZXJMfdcAtRBedou+Hx0dPOSIgqaIr0vvLwP65TpHbak2DmAq+KJbW2KNtIoFwvA==",
+      "dev": true,
+      "requires": {
+        "@nomicfoundation/ethereumjs-block": "5.0.2",
+        "@nomicfoundation/ethereumjs-blockchain": "7.0.2",
+        "@nomicfoundation/ethereumjs-common": "4.0.2",
+        "@nomicfoundation/ethereumjs-evm": "2.0.2",
+        "@nomicfoundation/ethereumjs-rlp": "5.0.2",
+        "@nomicfoundation/ethereumjs-statemanager": "2.0.2",
+        "@nomicfoundation/ethereumjs-trie": "6.0.2",
+        "@nomicfoundation/ethereumjs-tx": "5.0.2",
+        "@nomicfoundation/ethereumjs-util": "9.0.2",
         "debug": "^4.3.3",
         "ethereum-cryptography": "0.1.3",
-        "functional-red-black-tree": "^1.0.1",
         "mcl-wasm": "^0.7.1",
         "rustbn.js": "~0.2.0"
       }
@@ -9985,9 +10028,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "4.8.2",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.8.2.tgz",
-      "integrity": "sha512-kEUOgPQszC0fSYWpbh2kT94ltOJwj1qfT2DWo+zVttmGmf97JZ99LspePNaeeaLhCImaHVeBbjaQFZQn7+Zc5g=="
+      "version": "4.9.3",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.9.3.tgz",
+      "integrity": "sha512-He3LieZ1pP2TNt5JbkPA4PNT9WC3gOTOlDcFGJW4Le4QKqwmiNJCRt44APfxMxvq7OugU/cqYuPcSBzOw38DAg=="
     },
     "@scure/base": {
       "version": "1.1.1",
@@ -10194,12 +10237,6 @@
         }
       }
     },
-    "@types/async-eventemitter": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/@types/async-eventemitter/-/async-eventemitter-0.2.1.tgz",
-      "integrity": "sha512-M2P4Ng26QbAeITiH7w1d7OxtldgfAe0wobpyJzVK/XOb0cUGKU2R4pfAhqcJBXAe2ife5ZOhSv4wk7p+ffURtg==",
-      "dev": true
-    },
     "@types/bn.js": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/@types/bn.js/-/bn.js-5.1.1.tgz",
@@ -10304,6 +10341,24 @@
       "dev": true,
       "peer": true
     },
+    "@types/readable-stream": {
+      "version": "2.3.15",
+      "resolved": "https://registry.npmjs.org/@types/readable-stream/-/readable-stream-2.3.15.tgz",
+      "integrity": "sha512-oM5JSKQCcICF1wvGgmecmHldZ48OZamtMxcGGVICOJA8o8cahXC1zEVAif8iwoc5j8etxFaRFnf095+CDsuoFQ==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*",
+        "safe-buffer": "~5.1.1"
+      },
+      "dependencies": {
+        "safe-buffer": {
+          "version": "5.1.2",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+          "dev": true
+        }
+      }
+    },
     "@types/secp256k1": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/@types/secp256k1/-/secp256k1-4.0.3.tgz",
@@ -10319,15 +10374,6 @@
       "integrity": "sha512-LEyx4aLEC3x6T0UguF6YILf+ntvmOaWsVfENmIW0E9H09vKlLDGelMjjSm0jkDHALj8A8quZ/HapKNigzwge+Q==",
       "dev": true
     },
-    "abort-controller": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/abort-controller/-/abort-controller-3.0.0.tgz",
-      "integrity": "sha512-h8lQ8tacZYnR3vNQTgibj+tODHI5/+l06Au2Pcriv/Gmet0eaj4TwWH41sO9wnHDiQsEj19q0drzdWdeAHtweg==",
-      "dev": true,
-      "requires": {
-        "event-target-shim": "^5.0.0"
-      }
-    },
     "abstract-level": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/abstract-level/-/abstract-level-1.0.3.tgz",
@@ -10373,8 +10419,7 @@
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/aes-js/-/aes-js-3.0.0.tgz",
       "integrity": "sha512-H7wUZRn8WpTq9jocdxQ2c8x2sKo9ZVmzfRE13GiNJXfp7NcKYEdvl3vspKjXox6RIG2VtaRe4JFvxG4rqp2Zuw==",
-      "dev": true,
-      "peer": true
+      "dev": true
     },
     "agent-base": {
       "version": "6.0.2",
@@ -10551,24 +10596,6 @@
       "dev": true,
       "peer": true
     },
-    "async": {
-      "version": "2.6.4",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
-      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
-      "dev": true,
-      "requires": {
-        "lodash": "^4.17.14"
-      }
-    },
-    "async-eventemitter": {
-      "version": "0.2.4",
-      "resolved": "https://registry.npmjs.org/async-eventemitter/-/async-eventemitter-0.2.4.tgz",
-      "integrity": "sha512-pd20BwL7Yt1zwDFy+8MX8F1+WCT8aQeKj0kQnTrH9WaeRETlRamVhD0JtRPmrV4GfOJ2F9CvdQkZeZhnh2TuHw==",
-      "dev": true,
-      "requires": {
-        "async": "^2.4.0"
-      }
-    },
     "asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
@@ -10647,22 +10674,12 @@
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/bech32/-/bech32-1.1.4.tgz",
       "integrity": "sha512-s0IrSOzLlbvX7yp4WBfPITzpAU8sqQcpsmwXDiKwrG4r491vwCO/XpejasRNl0piBMe/DvP4Tz0mIS/X1DPJBQ==",
-      "dev": true,
-      "peer": true
+      "dev": true
     },
     "bigint-crypto-utils": {
-      "version": "3.1.8",
-      "resolved": "https://registry.npmjs.org/bigint-crypto-utils/-/bigint-crypto-utils-3.1.8.tgz",
-      "integrity": "sha512-+VMV9Laq8pXLBKKKK49nOoq9bfR3j7NNQAtbA617a4nw9bVLo8rsqkKMBgM2AJWlNX9fEIyYaYX+d0laqYV4tw==",
-      "dev": true,
-      "requires": {
-        "bigint-mod-arith": "^3.1.0"
-      }
-    },
-    "bigint-mod-arith": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/bigint-mod-arith/-/bigint-mod-arith-3.1.2.tgz",
-      "integrity": "sha512-nx8J8bBeiRR+NlsROFH9jHswW5HO8mgfOSqW0AmjicMMvaONDa8AO+5ViKDUUNytBPWiwfvZP4/Bj4Y3lUfvgQ==",
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/bigint-crypto-utils/-/bigint-crypto-utils-3.3.0.tgz",
+      "integrity": "sha512-jOTSb+drvEDxEq6OuUybOAv/xxoh3cuYRUIPyu8sSHQNKM303UQ2R1DAo45o1AkcIXw6fzbaFI1+xGGdaXs2lg==",
       "dev": true
     },
     "binary-extensions": {
@@ -10813,6 +10830,12 @@
       "integrity": "sha512-Gmy6FhYlCY7uOElZUSbxo2UCDH8owEk996gkbrpsgGtrJLM3J7jGxl9Ic7Qwwj4ivOE5AWZWRMecDdF7hqGjFA==",
       "dev": true
     },
+    "case": {
+      "version": "1.6.3",
+      "resolved": "https://registry.npmjs.org/case/-/case-1.6.3.tgz",
+      "integrity": "sha512-mzDSXIPaFwVDvZAHqZ9VlbyF4yyXRuX6IvB06WvPYkqJVO24kX1PPhv9bfpKNFZyxYFmmgo03HUiD8iklmJYRQ==",
+      "dev": true
+    },
     "caseless": {
       "version": "0.12.0",
       "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
@@ -10920,15 +10943,15 @@
       }
     },
     "classic-level": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/classic-level/-/classic-level-1.2.0.tgz",
-      "integrity": "sha512-qw5B31ANxSluWz9xBzklRWTUAJ1SXIdaVKTVS7HcTGKOAmExx65Wo5BUICW+YGORe2FOUaDghoI9ZDxj82QcFg==",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/classic-level/-/classic-level-1.3.0.tgz",
+      "integrity": "sha512-iwFAJQYtqRTRM0F6L8h4JCt00ZSGdOyqh7yVrhhjrOpFhmBjNlRUey64MCiyo6UmQHMJ+No3c81nujPv+n9yrg==",
       "dev": true,
       "requires": {
         "abstract-level": "^1.0.2",
         "catering": "^2.1.0",
         "module-error": "^1.0.1",
-        "napi-macros": "~2.0.0",
+        "napi-macros": "^2.2.2",
         "node-gyp-build": "^4.3.0"
       }
     },
@@ -12092,7 +12115,6 @@
       "resolved": "https://registry.npmjs.org/ethers/-/ethers-5.7.2.tgz",
       "integrity": "sha512-wswUsmWo1aOK8rR7DIKiWSw9DbLWe6x98Jrn8wcTflTVvaXhAMaB5zGAXy0GYQEQp9iO1iSHWVyARQm11zUtyg==",
       "dev": true,
-      "peer": true,
       "requires": {
         "@ethersproject/abi": "5.7.0",
         "@ethersproject/abstract-provider": "5.7.0",
@@ -12154,12 +12176,6 @@
         "strip-hex-prefix": "1.0.0"
       }
     },
-    "event-target-shim": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/event-target-shim/-/event-target-shim-5.0.1.tgz",
-      "integrity": "sha512-i/2XbnSz/uxRCU6+NdVJgKWDTM427+MqYbkQzD321DuCQJUqOuJKIA0IM2+W2xtYHdKOmZ4dR6fExsd4SXL+WQ==",
-      "dev": true
-    },
     "evp_bytestokey": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/evp_bytestokey/-/evp_bytestokey-1.0.3.tgz",
@@ -12568,28 +12584,27 @@
       }
     },
     "hardhat": {
-      "version": "2.13.0",
-      "resolved": "https://registry.npmjs.org/hardhat/-/hardhat-2.13.0.tgz",
-      "integrity": "sha512-ZlzBOLML1QGlm6JWyVAG8lVTEAoOaVm1in/RU2zoGAnYEoD1Rp4T+ZMvrLNhHaaeS9hfjJ1gJUBfiDr4cx+htQ==",
+      "version": "2.19.1",
+      "resolved": "https://registry.npmjs.org/hardhat/-/hardhat-2.19.1.tgz",
+      "integrity": "sha512-bsWa63g1GB78ZyMN08WLhFElLPA+J+pShuKD1BFO2+88g3l+BL3R07vj9deIi9dMbssxgE714Gof1dBEDGqnCw==",
       "dev": true,
       "requires": {
         "@ethersproject/abi": "^5.1.2",
         "@metamask/eth-sig-util": "^4.0.0",
-        "@nomicfoundation/ethereumjs-block": "^4.0.0",
-        "@nomicfoundation/ethereumjs-blockchain": "^6.0.0",
-        "@nomicfoundation/ethereumjs-common": "^3.0.0",
-        "@nomicfoundation/ethereumjs-evm": "^1.0.0",
-        "@nomicfoundation/ethereumjs-rlp": "^4.0.0",
-        "@nomicfoundation/ethereumjs-statemanager": "^1.0.0",
-        "@nomicfoundation/ethereumjs-trie": "^5.0.0",
-        "@nomicfoundation/ethereumjs-tx": "^4.0.0",
-        "@nomicfoundation/ethereumjs-util": "^8.0.0",
-        "@nomicfoundation/ethereumjs-vm": "^6.0.0",
+        "@nomicfoundation/ethereumjs-block": "5.0.2",
+        "@nomicfoundation/ethereumjs-blockchain": "7.0.2",
+        "@nomicfoundation/ethereumjs-common": "4.0.2",
+        "@nomicfoundation/ethereumjs-evm": "2.0.2",
+        "@nomicfoundation/ethereumjs-rlp": "5.0.2",
+        "@nomicfoundation/ethereumjs-statemanager": "2.0.2",
+        "@nomicfoundation/ethereumjs-trie": "6.0.2",
+        "@nomicfoundation/ethereumjs-tx": "5.0.2",
+        "@nomicfoundation/ethereumjs-util": "9.0.2",
+        "@nomicfoundation/ethereumjs-vm": "7.0.2",
         "@nomicfoundation/solidity-analyzer": "^0.1.0",
         "@sentry/node": "^5.18.1",
         "@types/bn.js": "^5.1.0",
         "@types/lru-cache": "^5.1.0",
-        "abort-controller": "^3.0.0",
         "adm-zip": "^0.4.16",
         "aggregate-error": "^3.0.0",
         "ansi-escapes": "^4.3.0",
@@ -12612,7 +12627,6 @@
         "mnemonist": "^0.38.0",
         "mocha": "^10.0.0",
         "p-map": "^4.0.0",
-        "qs": "^6.7.0",
         "raw-body": "^2.4.1",
         "resolve": "1.17.0",
         "semver": "^6.3.0",
@@ -13120,6 +13134,12 @@
       "dev": true,
       "peer": true
     },
+    "js-sdsl": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/js-sdsl/-/js-sdsl-4.4.2.tgz",
+      "integrity": "sha512-dwXFwByc/ajSV6m5bcKAPwe4yDDF6D614pxmIi5odytzxRlwqF6nwoiCek80Ixc7Cvma5awClxrzFtxCQvcM8w==",
+      "dev": true
+    },
     "js-sha3": {
       "version": "0.8.0",
       "resolved": "https://registry.npmjs.org/js-sha3/-/js-sha3-0.8.0.tgz",
@@ -13639,9 +13659,9 @@
       "dev": true
     },
     "napi-macros": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/napi-macros/-/napi-macros-2.0.0.tgz",
-      "integrity": "sha512-A0xLykHtARfueITVDernsAWdtIMbOJgKgcluwENp3AlsKN/PloyO10HtmoqnFAQAcxPkgZN7wdfPfEd0zNGxbg==",
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/napi-macros/-/napi-macros-2.2.2.tgz",
+      "integrity": "sha512-hmEVtAGYzVQpCKdbQea4skABsdXW4RUh5t5mJ2zzqowJS2OyXZTU1KhDVFhx+NlWZ4ap9mqR9TcDO3LTTttd+g==",
       "dev": true
     },
     "neo-async": {
@@ -13982,6 +14002,7 @@
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.11.1.tgz",
       "integrity": "sha512-0wsrzgTz/kAVIeuxSjnpGC56rzYtr6JT/2BwEvMaPhFIoYa1aGO8LbzuU1R0uUYQkLpWBTOj0l/CLAJB64J6nQ==",
       "dev": true,
+      "peer": true,
       "requires": {
         "side-channel": "^1.0.4"
       }
diff --git a/package.json b/package.json
index 3816acd..e91db0b 100644
--- a/package.json
+++ b/package.json
@@ -4,11 +4,11 @@
     "@nomicfoundation/hardhat-network-helpers": "^1.0.8",
     "@nomicfoundation/hardhat-toolbox": "^2.0.2",
     "codecov": "^3.8.3",
-    "hardhat": "^2.13.0",
+    "hardhat": "^2.19.1",
     "solidity-coverage": "^0.8.2"
   },
   "dependencies": {
-    "@openzeppelin/contracts": "^4.8.2"
+    "@openzeppelin/contracts": "^4.9.3"
   },
   "scripts": {
     "dev": "hardhat node",
diff --git a/test/WiiQareVoucherV1.js b/test/WiiQareVoucherV1.js
index 354211d..05bc6ab 100644
--- a/test/WiiQareVoucherV1.js
+++ b/test/WiiQareVoucherV1.js
@@ -26,8 +26,8 @@ describe("Wiiqare Voucher Contract Events", function () {
 
       const burnedVoucher = [ethers.BigNumber.from(0), "", "", "", "", ""];
 
-      const currentVoucherID = await wiiqareVoucher.getCurrentVoucherID();
       await wiiqareVoucher.mintVoucher(newVoucher);
+      const currentVoucherID = await wiiqareVoucher.getCurrentVoucherID();
       await wiiqareVoucher.burn(parseInt(currentVoucherID));
       expect(await wiiqareVoucher.vouchers(parseInt(currentVoucherID))).to.eql(
         burnedVoucher
@@ -144,9 +144,8 @@ describe("Wiiqare Voucher Contract Events", function () {
       ];
 
       const burnVoucher = [ethers.BigNumber.from(0), "", "", "", "", ""];
-      await wiiqareVoucher.mintVoucher(firstVoucher);
-      const currentVoucherID = await wiiqareVoucher.getCurrentVoucherID();
       await wiiqareVoucher.mintVoucher(initialVoucher);
+      const currentVoucherID = await wiiqareVoucher.getCurrentVoucherID();
       await wiiqareVoucher.splitVoucher(
         parseInt(currentVoucherID),
         firstVoucher,