diff --git a/.github/workflows/solidity-test.yml b/.github/workflows/solidity-test.yml
index 67548364..4c865d50 100644
--- a/.github/workflows/solidity-test.yml
+++ b/.github/workflows/solidity-test.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Run tests
         # Runs ganache in background
         run: |
-          npm run ganache & 
+          npm run buidler-vm & 
           npm test
         env:
           CI: true
diff --git a/buidler.config.js b/buidler.config.js
new file mode 100644
index 00000000..f053ebf7
--- /dev/null
+++ b/buidler.config.js
@@ -0,0 +1 @@
+module.exports = {};
diff --git a/package-lock.json b/package-lock.json
index d7522525..6051eaa4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,6 +24,554 @@
         "js-tokens": "^4.0.0"
       }
     },
+    "@nomiclabs/buidler": {
+      "version": "1.4.5",
+      "resolved": "https://registry.npmjs.org/@nomiclabs/buidler/-/buidler-1.4.5.tgz",
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+      "dev": true,
+      "requires": {
+        "@nomiclabs/ethereumjs-vm": "^4.1.1",
+        "@sentry/node": "^5.18.1",
+        "@solidity-parser/parser": "^0.5.2",
+        "@types/bn.js": "^4.11.5",
+        "@types/lru-cache": "^5.1.0",
+        "abort-controller": "^3.0.0",
+        "ansi-escapes": "^4.3.0",
+        "chalk": "^2.4.2",
+        "chokidar": "^3.4.0",
+        "ci-info": "^2.0.0",
+        "debug": "^4.1.1",
+        "deepmerge": "^2.1.0",
+        "download": "^7.1.0",
+        "enquirer": "^2.3.0",
+        "eth-sig-util": "^2.5.2",
+        "ethereum-cryptography": "^0.1.2",
+        "ethereumjs-abi": "^0.6.8",
+        "ethereumjs-account": "^3.0.0",
+        "ethereumjs-block": "^2.2.0",
+        "ethereumjs-common": "^1.3.2",
+        "ethereumjs-tx": "^2.1.1",
+        "ethereumjs-util": "^6.1.0",
+        "find-up": "^2.1.0",
+        "fp-ts": "1.19.3",
+        "fs-extra": "^7.0.1",
+        "glob": "^7.1.3",
+        "io-ts": "1.10.4",
+        "is-installed-globally": "^0.2.0",
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+        "node-fetch": "^2.6.0",
+        "qs": "^6.7.0",
+        "raw-body": "^2.4.1",
+        "semver": "^6.3.0",
+        "slash": "^3.0.0",
+        "solc": "0.6.8",
+        "source-map-support": "^0.5.13",
+        "ts-essentials": "^2.0.7",
+        "tsort": "0.0.1",
+        "uuid": "^3.3.2",
+        "ws": "^7.2.1"
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+      "dev": true,
+      "requires": {
+        "define-properties": "^1.1.3",
+        "es-abstract": "^1.17.5"
+      }
+    },
+    "string.prototype.trimstart": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimstart/-/string.prototype.trimstart-1.0.1.tgz",
+      "integrity": "sha512-XxZn+QpvrBI1FOcg6dIpxUPgWCPuNXvMD72aaRaUQv1eD4e/Qy8i/hFTe0BUmD60p/QA6bh1avmuPTfNjqVWRw==",
+      "dev": true,
+      "requires": {
+        "define-properties": "^1.1.3",
+        "es-abstract": "^1.17.5"
+      }
+    },
+    "string_decoder": {
+      "version": "0.10.31",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+      "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
+      "dev": true
+    },
     "strip-ansi": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
@@ -8205,6 +9847,15 @@
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       "dev": true
     },
+    "strip-outer": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/strip-outer/-/strip-outer-1.0.1.tgz",
+      "integrity": "sha512-k55yxKHwaXnpYGsOzg4Vl8+tDrWylxDEpknGjhTiZB8dFRU5rTo9CAzeycivxV3s+zlTKwrs6WxMxR95n26kwg==",
+      "dev": true,
+      "requires": {
+        "escape-string-regexp": "^1.0.2"
+      }
+    },
     "supports-color": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-4.4.0.tgz",
@@ -8547,6 +10198,15 @@
         }
       }
     },
+    "trim-repeated": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/trim-repeated/-/trim-repeated-1.0.0.tgz",
+      "integrity": "sha1-42RqLqTokTEr9+rObPsFOAvAHCE=",
+      "dev": true,
+      "requires": {
+        "escape-string-regexp": "^1.0.2"
+      }
+    },
     "truffle": {
       "version": "5.1.8",
       "resolved": "https://registry.npmjs.org/truffle/-/truffle-5.1.8.tgz",
@@ -8653,12 +10313,24 @@
       "integrity": "sha1-NEiaLKwMCcHMEO2RugEVlNQzO+I=",
       "dev": true
     },
+    "ts-essentials": {
+      "version": "2.0.12",
+      "resolved": "https://registry.npmjs.org/ts-essentials/-/ts-essentials-2.0.12.tgz",
+      "integrity": "sha512-3IVX4nI6B5cc31/GFFE+i8ey/N2eA0CZDbo6n0yrz0zDX8ZJ8djmU1p+XRz7G3is0F3bB3pu2pAroFdAWQKU3w==",
+      "dev": true
+    },
     "tslib": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.10.0.tgz",
       "integrity": "sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==",
       "dev": true
     },
+    "tsort": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/tsort/-/tsort-0.0.1.tgz",
+      "integrity": "sha1-4igPXoF/i/QnVlf9D5rr1E9aJ4Y=",
+      "dev": true
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -8674,6 +10346,12 @@
       "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
       "dev": true
     },
+    "tweetnacl-util": {
+      "version": "0.15.1",
+      "resolved": "https://registry.npmjs.org/tweetnacl-util/-/tweetnacl-util-0.15.1.tgz",
+      "integrity": "sha512-RKJBIj8lySrShN4w6i/BonWp2Z/uxwC3h4y7xsRrpP59ZboCd0GpEVsOnMDYLMmKBpYhb5TgHzZXy7wTfYFBRw==",
+      "dev": true
+    },
     "type": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/type/-/type-1.2.0.tgz",
@@ -8878,6 +10556,18 @@
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
       "dev": true
     },
+    "util.promisify": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/util.promisify/-/util.promisify-1.0.1.tgz",
+      "integrity": "sha512-g9JpC/3He3bm38zsLupWryXHoEcS22YHthuPQSJdMy6KNrzIRzWqcsHzD/WUnqe45whVou4VIsPew37DoXWNrA==",
+      "dev": true,
+      "requires": {
+        "define-properties": "^1.1.3",
+        "es-abstract": "^1.17.2",
+        "has-symbols": "^1.0.1",
+        "object.getownpropertydescriptors": "^2.1.0"
+      }
+    },
     "utils-merge": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
@@ -9619,7 +11309,7 @@
       }
     },
     "websocket": {
-      "version": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
+      "version": "github:web3-js/WebSocket-Node#ef5ea2f41daf4a2113b80c9223df884b4d56c400",
       "from": "github:web3-js/WebSocket-Node#polyfill/globalThis",
       "dev": true,
       "requires": {
@@ -9650,6 +11340,21 @@
         "isexe": "^2.0.0"
       }
     },
+    "which-module": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
+      "dev": true
+    },
+    "wide-align": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
+      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
+      "dev": true,
+      "requires": {
+        "string-width": "^1.0.2 || 2"
+      }
+    },
     "word-wrap": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
@@ -9781,6 +11486,146 @@
       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
       "dev": true
     },
+    "yargs": {
+      "version": "13.3.2",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.2.tgz",
+      "integrity": "sha512-AX3Zw5iPruN5ie6xGRIDgqkT+ZhnRlZMLMHAs8tg7nRruy2Nb+i5o9bwghAogtM08q1dpr2LVoS8KSTMYpWXUw==",
+      "dev": true,
+      "requires": {
+        "cliui": "^5.0.0",
+        "find-up": "^3.0.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^3.0.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^13.1.2"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+          "dev": true
+        },
+        "emoji-regex": {
+          "version": "7.0.3",
+          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
+          "integrity": "sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==",
+          "dev": true
+        },
+        "find-up": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
+          "integrity": "sha512-1yD6RmLI1XBfxugvORwlck6f75tYL+iR0jqwsOrOxMZyGYqUuDhJ0l4AXdO1iX/FTs9cBAMEk1gWSEx1kSbylg==",
+          "dev": true,
+          "requires": {
+            "locate-path": "^3.0.0"
+          }
+        },
+        "get-caller-file": {
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
+          "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "locate-path": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
+          "integrity": "sha512-7AO748wWnIhNqAuaty2ZWHkQHRSNfPVIsPIfwEOWO22AmaoVrWavlOcMR5nzTLNYvp36X220/maaRsrec1G65A==",
+          "dev": true,
+          "requires": {
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
+          }
+        },
+        "p-limit": {
+          "version": "2.3.0",
+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
+          "integrity": "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==",
+          "dev": true,
+          "requires": {
+            "p-try": "^2.0.0"
+          }
+        },
+        "p-locate": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
+          "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
+          "dev": true,
+          "requires": {
+            "p-limit": "^2.0.0"
+          }
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+        "p-try": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
+          "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
+          "dev": true
+        },
+        "require-main-filename": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
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+          "dev": true
+        },
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
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+          "dev": true,
+          "requires": {
+            "ansi-regex": "^4.1.0"
+          }
+        },
+        "y18n": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+          "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+          "dev": true
+        }
+      }
+    },
+    "yargs-parser": {
+      "version": "13.1.2",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
+      "integrity": "sha512-3lbsNRf/j+A4QuSZfDRA7HRSfWrzO0YjqTJd5kjAq37Zep1CEgaYmrH9Q3GwPiB9cHyd1Y1UwggGhJGoxipbzg==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
+    },
+    "yargs-unparser": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.0.tgz",
+      "integrity": "sha512-W9tKgmSn0DpSatfri0nx52Joq5hVXgeLiqR/5G0sZNDoLZFOr/xjBUDcShCOGNsBnEMNo1KAMBkTej1Hm62HTw==",
+      "dev": true,
+      "requires": {
+        "flat": "^4.1.0",
+        "lodash": "^4.17.15",
+        "yargs": "^13.3.0"
+      }
+    },
     "yauzl": {
       "version": "2.10.0",
       "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
diff --git a/package.json b/package.json
index fe96be17..5a164f4d 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,9 @@
     "registry": "https://npm.pkg.github.com/"
   },
   "scripts": {
-    "ganache": "ganache-cli -q",
+    "ganache": "echo 'GANACHE IS NO LONGER USED; use buidler-vm script instead'",
+    "buidler-vm": "buidler node",
+    "buidler-vm:log": "buidler node | grep '^    \\|console.log'",
     "test": "NODE_ENV=test truffle test",
     "lint": "npm run lint:js && npm run lint:sol",
     "lint:fix": "npm run lint:fix:js && npm run lint:fix:sol",
@@ -40,17 +42,17 @@
     "@openzeppelin/contracts": "^2.4.0"
   },
   "devDependencies": {
+    "@nomiclabs/buidler": "^1.4.5",
     "@openzeppelin/test-helpers": "^0.5.4",
     "eslint": "^6.8.0",
     "eslint-config-keep": "github:keep-network/eslint-config-keep#0.3.0",
-    "ethlint": "^1.2.5",
     "eth-gas-reporter": "^0.1.12",
-    "ganache-cli": "^6.4.3",
+    "ethlint": "^1.2.5",
+    "prettier": "^2.0.2",
+    "prettier-plugin-solidity": "^1.0.0-alpha.47",
     "solc": "0.5.17",
     "solium": "^1.2.5",
     "solium-config-keep": "github:keep-network/solium-config-keep#0.1.2",
-    "truffle": "^5.1.0",
-    "prettier": "^2.0.2",
-    "prettier-plugin-solidity": "^1.0.0-alpha.47"
+    "truffle": "^5.1.0"
   }
 }