title: How to fix DeprecationWarning: Buffer()
body: <p>I am building a web app from a sample I found, and get a warning in my output "DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead."</p>
  
  <p>In the package-lock.json file it refers to safer-buffer, which from my research is what is used to upgrade the buffer, however I am assuming this may be causing the issue. Here are the parts of the file which refer to buffer:</p>
  
  <pre><code>    "asn1": {
        "version": "0.2.4",
        "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
        "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
        "requires": {
          "safer-buffer": "~2.1.0"
        }
  
     "bl": {
        "version": "2.2.0",
        "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.0.tgz",
        "integrity": "sha512-wbgvOpqopSr7uq6fJrLH8EsvYMJf9gzfo2jCsL2eTy75qXPukA4pCgHamOQkZtY5vmfVtjB+P3LNlMHW5CEZXA==",
        "requires": {
          "readable-stream": "^2.3.5",
          "safe-buffer": "^5.1.1"
        }
  
    "buffer-equal-constant-time": {
        "version": "1.0.1",
        "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
        "integrity": "sha1-+OcRMvf/5uAaXJaXpMbz5I1cyBk="
      },
  
   "ecc-jsbn": {
        "version": "0.1.2",
        "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz",
        "integrity": "sha1-OoOpBOVDUyh4dMVkt1SThoSamMk=",
        "requires": {
          "jsbn": "~0.1.0",
          "safer-buffer": "^2.1.0"
        }
      },
  
  
      "ecdsa-sig-formatter": {
        "version": "1.0.11",
        "resolved": "https://registry.npmjs.org/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz",
        "integrity": "sha512-nagl3RYrbNv6kQkeJIpt6NJZy8twLB/2vtz6yN9Z4vRKHN4/QZJIEbqohALSgwKdnksuY3k5Addp5lg8sVoVcQ==",
        "requires": {
          "safe-buffer": "^5.0.1"
        }
      },
  
      "express": {
        "version": "4.16.4",
        "resolved": "https://registry.npmjs.org/express/-/express-4.16.4.tgz",
        "integrity": "sha512-j12Uuyb4FMrd/qQAm6uCHAkPtO8FDTRJZBDd5D2KOL2eLaz1yUNdUB/NOIyq0iU4q4cFarsUCrnFDPBcnksuOg==",
        "requires": {
          "accepts": "~1.3.5",
          "array-flatten": "1.1.1",
          "body-parser": "1.18.3",
          "content-disposition": "0.5.2",
          "content-type": "~1.0.4",
          "cookie": "0.3.1",
          "cookie-signature": "1.0.6",
          "debug": "2.6.9",
          "depd": "~1.1.2",
          "encodeurl": "~1.0.2",
          "escape-html": "~1.0.3",
          "etag": "~1.8.1",
          "finalhandler": "1.1.1",
          "fresh": "0.5.2",
          "merge-descriptors": "1.0.1",
          "methods": "~1.1.2",
          "on-finished": "~2.3.0",
          "parseurl": "~1.3.2",
          "path-to-regexp": "0.1.7",
          "proxy-addr": "~2.0.4",
          "qs": "6.5.2",
          "range-parser": "~1.2.0",
          "safe-buffer": "5.1.2",
          "send": "0.16.2",
          "serve-static": "1.13.2",
          "setprototypeof": "1.1.0",
          "statuses": "~1.4.0",
          "type-is": "~1.6.16",
          "utils-merge": "1.0.1",
          "vary": "~1.1.2"
        }
  
      "iconv-lite": {
        "version": "0.4.23",
        "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.23.tgz",
        "integrity": "sha512-neyTUVFtahjf0mB3dZT77u+8O0QB89jFdnBkd5P1JgYPbPaia3gXXOVL2fq8VyU2gMMD7SaN7QukTB/pmXYvDA==",
        "requires": {
          "safer-buffer": "&gt;= 2.1.2 &lt; 3"
        }
      },
  
      "jwa": {
        "version": "1.4.1",
        "resolved": "https://registry.npmjs.org/jwa/-/jwa-1.4.1.tgz",
        "integrity": "sha512-qiLX/xhEEFKUAJ6FiBMbes3w9ATzyk5W7Hvzpa/SLYdxNtng+gcurvrI7TbACjIXlsJyr05/S1oUhZrc63evQA==",
        "requires": {
          "buffer-equal-constant-time": "1.0.1",
          "ecdsa-sig-formatter": "1.0.11",
          "safe-buffer": "^5.0.1"
        }
      },
  
  
      "jws": {
        "version": "3.2.2",
        "resolved": "https://registry.npmjs.org/jws/-/jws-3.2.2.tgz",
        "integrity": "sha512-YHlZCB6lMTllWDtSPHz/ZXTsi8S00usEV6v1tjq8tOUZzw7DpSDWVXjXDre6ed1w/pd495ODpHZYSdkRTsa0HA==",
        "requires": {
          "jwa": "^1.4.1",
          "safe-buffer": "^5.0.1"
        }
      },
  
      "mysql": {
        "version": "2.16.0",
        "resolved": "https://registry.npmjs.org/mysql/-/mysql-2.16.0.tgz",
        "integrity": "sha512-dPbN2LHonQp7D5ja5DJXNbCLe/HRdu+f3v61aguzNRQIrmZLOeRoymBYyeThrR6ug+FqzDL95Gc9maqZUJS+Gw==",
        "requires": {
          "bignumber.js": "4.1.0",
          "readable-stream": "2.3.6",
          "safe-buffer": "5.1.2",
          "sqlstring": "2.3.1"
        }
      },
  
      "readable-stream": {
        "version": "2.3.6",
        "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
        "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
        "requires": {
          "core-util-is": "~1.0.0",
          "inherits": "~2.0.3",
          "isarray": "~1.0.0",
          "process-nextick-args": "~2.0.0",
          "safe-buffer": "~5.1.1",
          "string_decoder": "~1.1.1",
          "util-deprecate": "~1.0.1"
        }
      },
  
      "request": {
        "version": "2.88.0",
        "resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz",
        "integrity": "sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==",
        "requires": {
          "aws-sign2": "~0.7.0",
          "aws4": "^1.8.0",
          "caseless": "~0.12.0",
          "combined-stream": "~1.0.6",
          "extend": "~3.0.2",
          "forever-agent": "~0.6.1",
          "form-data": "~2.3.2",
          "har-validator": "~5.1.0",
          "http-signature": "~1.2.0",
          "is-typedarray": "~1.0.0",
          "isstream": "~0.1.2",
          "json-stringify-safe": "~5.0.1",
          "mime-types": "~2.1.19",
          "oauth-sign": "~0.9.0",
          "performance-now": "^2.1.0",
          "qs": "~6.5.2",
          "safe-buffer": "^5.1.2",
          "tough-cookie": "~2.4.3",
          "tunnel-agent": "^0.6.0",
          "uuid": "^3.3.2"
        }
      },
  
  
      "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=="
      },
  
  
      "safer-buffer": {
        "version": "2.1.2",
        "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
        "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
      },
  
      "sshpk": {
        "version": "1.16.1",
        "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
        "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
        "requires": {
          "asn1": "~0.2.3",
          "assert-plus": "^1.0.0",
          "bcrypt-pbkdf": "^1.0.0",
          "dashdash": "^1.12.0",
          "ecc-jsbn": "~0.1.1",
          "getpass": "^0.1.1",
          "jsbn": "~0.1.0",
          "safer-buffer": "^2.0.2",
          "tweetnacl": "~0.14.0"
        }
      },
  
      "string_decoder": {
        "version": "1.1.1",
        "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
        "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
        "requires": {
          "safe-buffer": "~5.1.0"
        }
      },
  
     "tunnel-agent": {
        "version": "0.6.0",
        "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
        "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
        "requires": {
          "safe-buffer": "^5.0.1"
        }
      },
  </code></pre>
  
  <p>Anyone know what I need to do to "upgrade" these references so I am not getting the depreciation warning?</p>