diff --git a/package-lock.json b/package-lock.json
index 99ca8f9..4a0d9e3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,7 @@
         "@ethersproject/wallet": "^5.5.0",
         "@metamask/detect-provider": "^1.2.0",
         "@metamask/onboarding": "^1.0.1",
-        "@openzeppelin/contracts": "^4.5.0",
+        "@openzeppelin/contracts": "^4.8.3",
         "@web3-react/core": "^6.1.9",
         "@web3-react/injected-connector": "^6.0.7",
         "classnames": "^2.3.1",
@@ -49,9 +49,6 @@
         "prettier": "^2.5.1",
         "typechain": "^6.0.5",
         "typescript": "^4.5.4"
-      },
-      "engines": {
-        "node": ">=14"
       }
     },
     "node_modules/@ampproject/remapping": {
@@ -2660,29 +2657,6 @@
         "hardhat": "^2.0.4"
       }
     },
-    "node_modules/@nomiclabs/hardhat-etherscan/node_modules/fs-extra": {
-      "version": "7.0.1",
-      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
-      "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
-      "dev": true,
-      "dependencies": {
-        "graceful-fs": "^4.1.2",
-        "jsonfile": "^4.0.0",
-        "universalify": "^0.1.0"
-      },
-      "engines": {
-        "node": ">=6 <7 || >=8"
-      }
-    },
-    "node_modules/@nomiclabs/hardhat-etherscan/node_modules/jsonfile": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-      "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
-      "dev": true,
-      "optionalDependencies": {
-        "graceful-fs": "^4.1.6"
-      }
-    },
     "node_modules/@nomiclabs/hardhat-waffle": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/@nomiclabs/hardhat-waffle/-/hardhat-waffle-2.0.3.tgz",
@@ -2700,9 +2674,9 @@
       }
     },
     "node_modules/@openzeppelin/contracts": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.5.0.tgz",
-      "integrity": "sha512-fdkzKPYMjrRiPK6K4y64e6GzULR7R7RwxSigHS8DDp7aWDeoReqsQI+cxHV1UuhAqX69L1lAaWDxenfP+xiqzA=="
+      "version": "4.8.3",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.8.3.tgz",
+      "integrity": "sha512-bQHV8R9Me8IaJoJ2vPG4rXcL7seB7YVuskr4f+f5RyOStSZetwzkWtoqDMl5erkBJy0lDRUnIR2WIkPiC0GJlg=="
     },
     "node_modules/@resolver-engine/core": {
       "version": "0.3.3",
@@ -6856,6 +6830,20 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/fs-extra": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
+      "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
+      "dev": true,
+      "dependencies": {
+        "graceful-fs": "^4.1.2",
+        "jsonfile": "^4.0.0",
+        "universalify": "^0.1.0"
+      },
+      "engines": {
+        "node": ">=6 <7 || >=8"
+      }
+    },
     "node_modules/fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -16418,20 +16406,6 @@
         "node": ">=0.8.0"
       }
     },
-    "node_modules/hardhat/node_modules/fs-extra": {
-      "version": "7.0.1",
-      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
-      "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
-      "dev": true,
-      "dependencies": {
-        "graceful-fs": "^4.1.2",
-        "jsonfile": "^4.0.0",
-        "universalify": "^0.1.0"
-      },
-      "engines": {
-        "node": ">=6 <7 || >=8"
-      }
-    },
     "node_modules/hardhat/node_modules/has-flag": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
@@ -16442,9 +16416,9 @@
       }
     },
     "node_modules/hardhat/node_modules/jsonfile": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-      "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-2.4.0.tgz",
+      "integrity": "sha512-PKllAqbgLgxHaj8TElYymKCAgrASebJrWpTnEkOaTowt23VKXXN0sUeriJ+eh7y6ufb/CC5ap11pz71/cM0hUw==",
       "dev": true,
       "optionalDependencies": {
         "graceful-fs": "^4.1.6"
@@ -18568,6 +18542,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/jsonfile": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
+      "integrity": "sha512-m6F1R3z8jjlf2imQHS2Qez5sjKWQzbuuhuJ/FKYFRZvPE3PuHcSMVZzfsLhGVOkfd20obL5SWEBew5ShlquNxg==",
+      "dev": true,
+      "optionalDependencies": {
+        "graceful-fs": "^4.1.6"
+      }
+    },
     "node_modules/jsprim": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-2.0.2.tgz",
@@ -22790,29 +22773,6 @@
         "typescript": ">=4.1.0"
       }
     },
-    "node_modules/typechain/node_modules/fs-extra": {
-      "version": "7.0.1",
-      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
-      "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
-      "dev": true,
-      "dependencies": {
-        "graceful-fs": "^4.1.2",
-        "jsonfile": "^4.0.0",
-        "universalify": "^0.1.0"
-      },
-      "engines": {
-        "node": ">=6 <7 || >=8"
-      }
-    },
-    "node_modules/typechain/node_modules/jsonfile": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-      "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
-      "dev": true,
-      "optionalDependencies": {
-        "graceful-fs": "^4.1.6"
-      }
-    },
     "node_modules/typechain/node_modules/mkdirp": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
@@ -25235,28 +25195,6 @@
         "fs-extra": "^7.0.1",
         "semver": "^6.3.0",
         "undici": "^4.14.1"
-      },
-      "dependencies": {
-        "fs-extra": {
-          "version": "7.0.1",
-          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
-          "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.2",
-            "jsonfile": "^4.0.0",
-            "universalify": "^0.1.0"
-          }
-        },
-        "jsonfile": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-          "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.6"
-          }
-        }
       }
     },
     "@nomiclabs/hardhat-waffle": {
@@ -25270,9 +25208,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.5.0.tgz",
-      "integrity": "sha512-fdkzKPYMjrRiPK6K4y64e6GzULR7R7RwxSigHS8DDp7aWDeoReqsQI+cxHV1UuhAqX69L1lAaWDxenfP+xiqzA=="
+      "version": "4.8.3",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.8.3.tgz",
+      "integrity": "sha512-bQHV8R9Me8IaJoJ2vPG4rXcL7seB7YVuskr4f+f5RyOStSZetwzkWtoqDMl5erkBJy0lDRUnIR2WIkPiC0GJlg=="
     },
     "@resolver-engine/core": {
       "version": "0.3.3",
@@ -28610,6 +28548,17 @@
       "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac=",
       "dev": true
     },
+    "fs-extra": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
+      "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.2",
+        "jsonfile": "^4.0.0",
+        "universalify": "^0.1.0"
+      }
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -35958,17 +35907,6 @@
           "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
           "dev": true
         },
-        "fs-extra": {
-          "version": "7.0.1",
-          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
-          "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.2",
-            "jsonfile": "^4.0.0",
-            "universalify": "^0.1.0"
-          }
-        },
         "has-flag": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
@@ -35976,9 +35914,9 @@
           "dev": true
         },
         "jsonfile": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-          "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
+          "version": "2.4.0",
+          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-2.4.0.tgz",
+          "integrity": "sha512-PKllAqbgLgxHaj8TElYymKCAgrASebJrWpTnEkOaTowt23VKXXN0sUeriJ+eh7y6ufb/CC5ap11pz71/cM0hUw==",
           "dev": true,
           "requires": {
             "graceful-fs": "^4.1.6"
@@ -37562,6 +37500,15 @@
         "minimist": "^1.2.5"
       }
     },
+    "jsonfile": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
+      "integrity": "sha512-m6F1R3z8jjlf2imQHS2Qez5sjKWQzbuuhuJ/FKYFRZvPE3PuHcSMVZzfsLhGVOkfd20obL5SWEBew5ShlquNxg==",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.6"
+      }
+    },
     "jsprim": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-2.0.2.tgz",
@@ -40786,26 +40733,6 @@
         "ts-essentials": "^7.0.1"
       },
       "dependencies": {
-        "fs-extra": {
-          "version": "7.0.1",
-          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
-          "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.2",
-            "jsonfile": "^4.0.0",
-            "universalify": "^0.1.0"
-          }
-        },
-        "jsonfile": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-          "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.6"
-          }
-        },
         "mkdirp": {
           "version": "1.0.4",
           "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
diff --git a/package.json b/package.json
index 1f5dd8c..c5982f5 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "@ethersproject/wallet": "^5.5.0",
     "@metamask/detect-provider": "^1.2.0",
     "@metamask/onboarding": "^1.0.1",
-    "@openzeppelin/contracts": "^4.5.0",
+    "@openzeppelin/contracts": "^4.8.3",
     "@web3-react/core": "^6.1.9",
     "@web3-react/injected-connector": "^6.0.7",
     "classnames": "^2.3.1",
diff --git a/yarn.lock b/yarn.lock
index 8db38b3..b21bf69 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1235,10 +1235,10 @@
     "@types/sinon-chai" "^3.2.3"
     "@types/web3" "1.0.19"
 
-"@openzeppelin/contracts@^4.5.0":
-  version "4.5.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.5.0.tgz#3fd75d57de172b3743cdfc1206883f56430409cc"
-  integrity sha512-fdkzKPYMjrRiPK6K4y64e6GzULR7R7RwxSigHS8DDp7aWDeoReqsQI+cxHV1UuhAqX69L1lAaWDxenfP+xiqzA==
+"@openzeppelin/contracts@^4.8.3":
+  version "4.8.3"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.8.3.tgz#cbef3146bfc570849405f59cba18235da95a252a"
+  integrity sha512-bQHV8R9Me8IaJoJ2vPG4rXcL7seB7YVuskr4f+f5RyOStSZetwzkWtoqDMl5erkBJy0lDRUnIR2WIkPiC0GJlg==
 
 "@resolver-engine/core@^0.3.3":
   version "0.3.3"