diff --git a/package-lock.json b/package-lock.json
index bc19537..86ccce4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,26 +9,56 @@
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+      "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-0.2.3.tgz",
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-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
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+    "node_modules/@istanbuljs/schema": {
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+      "resolved": "https://registry.npmjs.org/@istanbuljs/schema/-/schema-0.1.3.tgz",
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       "dev": true,
-      "optional": true,
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-        "node": ">=0.4.2"
+        "node": ">=8"
+      }
+    },
+    "node_modules/@jridgewell/resolve-uri": {
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+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.0.tgz",
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+      "engines": {
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+    "node_modules/@jridgewell/sourcemap-codec": {
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+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.14.tgz",
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+      "dev": true
+    },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.17",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.17.tgz",
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+      "dev": true,
+      "dependencies": {
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+        "@jridgewell/sourcemap-codec": "1.4.14"
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+    "node_modules/@types/istanbul-lib-coverage": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.4.tgz",
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+      "dev": true
+    },
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@@ -75,21 +105,6 @@
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-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
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-      "dev": true,
-      "dependencies": {
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-      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
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@@ -133,6 +148,41 @@
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       "dev": true
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+    "node_modules/c8": {
+      "version": "7.13.0",
+      "resolved": "https://registry.npmjs.org/c8/-/c8-7.13.0.tgz",
+      "integrity": "sha512-/NL4hQTv1gBL6J6ei80zu3IiTrmePDKXKXOTLpHvcIWZTVYQlDhVWjjWvkhICylE8EwwnMVzDZugCvdx0/DIIA==",
+      "dev": true,
+      "dependencies": {
+        "@bcoe/v8-coverage": "^0.2.3",
+        "@istanbuljs/schema": "^0.1.3",
+        "find-up": "^5.0.0",
+        "foreground-child": "^2.0.0",
+        "istanbul-lib-coverage": "^3.2.0",
+        "istanbul-lib-report": "^3.0.0",
+        "istanbul-reports": "^3.1.4",
+        "rimraf": "^3.0.2",
+        "test-exclude": "^6.0.0",
+        "v8-to-istanbul": "^9.0.0",
+        "yargs": "^16.2.0",
+        "yargs-parser": "^20.2.9"
+      },
+      "bin": {
+        "c8": "bin/c8.js"
+      },
+      "engines": {
+        "node": ">=10.12.0"
+      }
+    },
+    "node_modules/c8/node_modules/yargs-parser": {
+      "version": "20.2.9",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.9.tgz",
+      "integrity": "sha512-y11nGElTIV+CT3Zv9t7VKl+Q3hTQoT9a1Qzezhhl6Rp21gJ/IVTW7Z3y9EWXhuUBC2Shnf+DX0antecpAwSP8w==",
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/camelcase": {
       "version": "6.3.0",
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-6.3.0.tgz",
@@ -244,6 +294,41 @@
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       "dev": true
     },
+    "node_modules/convert-source-map": {
+      "version": "1.9.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.9.0.tgz",
+      "integrity": "sha512-ASFBup0Mz1uyiIjANan1jzLQami9z1PoYSZCiiYW2FczPbenXc45FZdBZLzOT+r6+iciuEModtmCti+hjaAk0A==",
+      "dev": true
+    },
+    "node_modules/cross-spawn": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
+      "integrity": "sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==",
+      "dev": true,
+      "dependencies": {
+        "path-key": "^3.1.0",
+        "shebang-command": "^2.0.0",
+        "which": "^2.0.1"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/cross-spawn/node_modules/which": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "dev": true,
+      "dependencies": {
+        "isexe": "^2.0.0"
+      },
+      "bin": {
+        "node-which": "bin/node-which"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
     "node_modules/debug": {
       "version": "4.3.4",
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@@ -279,12 +364,6 @@
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       }
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-      "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.4.tgz",
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@@ -321,65 +400,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
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-    "node_modules/escodegen": {
-      "version": "1.8.1",
-      "resolved": "https://registry.npmjs.org/escodegen/-/escodegen-1.8.1.tgz",
-      "integrity": "sha512-yhi5S+mNTOuRvyW4gWlg5W1byMaQGWWSYHXsuFZ7GBo7tpyOwi2EdzMP/QWxh9hwkD2m+wDVHJsxhRIj+v/b/A==",
-      "dev": true,
-      "dependencies": {
-        "esprima": "^2.7.1",
-        "estraverse": "^1.9.1",
-        "esutils": "^2.0.2",
-        "optionator": "^0.8.1"
-      },
-      "bin": {
-        "escodegen": "bin/escodegen.js",
-        "esgenerate": "bin/esgenerate.js"
-      },
-      "engines": {
-        "node": ">=0.12.0"
-      },
-      "optionalDependencies": {
-        "source-map": "~0.2.0"
-      }
-    },
-    "node_modules/esprima": {
-      "version": "2.7.3",
-      "resolved": "https://registry.npmjs.org/esprima/-/esprima-2.7.3.tgz",
-      "integrity": "sha512-OarPfz0lFCiW4/AV2Oy1Rp9qu0iusTKqykwTspGCZtPxmF81JR4MmIebvF1F9+UOKth2ZubLQ4XGGaU+hSn99A==",
-      "dev": true,
-      "bin": {
-        "esparse": "bin/esparse.js",
-        "esvalidate": "bin/esvalidate.js"
-      },
-      "engines": {
-        "node": ">=0.10.0"
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-    "node_modules/estraverse": {
-      "version": "1.9.3",
-      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-1.9.3.tgz",
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-      "dev": true,
-      "engines": {
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-      "resolved": "https://registry.npmjs.org/esutils/-/esutils-2.0.3.tgz",
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-      "dev": true,
-      "engines": {
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-    "node_modules/fast-levenshtein": {
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-      "resolved": "https://registry.npmjs.org/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz",
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@@ -417,6 +437,19 @@
         "flat": "cli.js"
       }
     },
+    "node_modules/foreground-child": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-2.0.0.tgz",
+      "integrity": "sha512-dCIq9FpEcyQyXKCkyzmlPTFNgrCzPudOe+mhvJU5zAtlBnGVy2yKxtfsxK2tQBThwq225jcvBjpw1Gr40uzZCA==",
+      "dev": true,
+      "dependencies": {
+        "cross-spawn": "^7.0.0",
+        "signal-exit": "^3.0.2"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
     "node_modules/fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -446,22 +479,6 @@
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-      "resolved": "https://registry.npmjs.org/glob/-/glob-5.0.15.tgz",
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-      "dev": true,
-      "dependencies": {
-        "inflight": "^1.0.4",
-        "inherits": "2",
-        "minimatch": "2 || 3",
-        "once": "^1.3.0",
-        "path-is-absolute": "^1.0.0"
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-      "engines": {
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@@ -474,45 +491,6 @@
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-        "neo-async": "^2.6.0",
-        "source-map": "^0.6.1",
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-      "bin": {
-        "handlebars": "bin/handlebars"
-      },
-      "engines": {
-        "node": ">=0.4.7"
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-      "optionalDependencies": {
-        "uglify-js": "^3.1.4"
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-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
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-      "dev": true,
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-    "node_modules/has-flag": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-1.0.0.tgz",
-      "integrity": "sha512-DyYHfIYwAJmjAjSSPKANxI8bFY9YtFrgkAfinBojQ8YJTOuOuav64tMUJv584SES4xl74PmuaevIyaLESHdTAA==",
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       "resolved": "https://registry.npmjs.org/he/-/he-1.2.0.tgz",
@@ -522,6 +500,12 @@
         "he": "bin/he"
       }
     },
+    "node_modules/html-escaper": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
+      "integrity": "sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg==",
+      "dev": true
+    },
     "node_modules/inflight": {
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-      "resolved": "https://registry.npmjs.org/istanbul/-/istanbul-0.4.5.tgz",
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-      "deprecated": "This module is no longer maintained, try this instead:\n  npm i nyc\nVisit https://istanbul.js.org/integrations for other alternatives.",
+    "node_modules/istanbul-lib-coverage": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.2.0.tgz",
+      "integrity": "sha512-eOeJ5BHCmHYvQK7xt9GkdHuzuCGS1Y6g9Gvnx3Ym33fz/HpLRYxiS0wHNr+m/MBC8B647Xt608vCDEvhl9c6Mw==",
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-        "escodegen": "1.8.x",
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-        "mkdirp": "0.5.x",
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-        "once": "1.x",
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-        "which": "^1.1.1",
-        "wordwrap": "^1.0.0"
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-      "bin": {
-        "istanbul": "lib/cli.js"
+      "engines": {
+        "node": ">=8"
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       "dev": true,
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-        "argparse": "^1.0.7",
-        "esprima": "^4.0.0"
+        "istanbul-lib-coverage": "^3.0.0",
+        "make-dir": "^3.0.0",
+        "supports-color": "^7.1.0"
       },
-      "bin": {
-        "js-yaml": "bin/js-yaml.js"
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/istanbul-lib-report/node_modules/has-flag": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+      "dev": true,
+      "engines": {
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diff --git a/package.json b/package.json
index 21a490e..fb9f471 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
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-    "coverage": "istanbul cover ./node_modules/mocha/bin/_mocha"
+    "coverage": "c8 npm run test"
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   "localMaintainers": [
     "haad <haad@haja.io>",
@@ -34,7 +34,7 @@
     "hajamark <mark@haja.io>"
   ],
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-    "istanbul": "^0.4.5",
+    "c8": "^7.13.0",
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 }