diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..a980cf1
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,7 @@
+[{*.html, *.js, *.json, *.rjson, *.ts}]
+end_of_line = lf
+trim_trailing_whitespace = true
+insert_final_newline = true
+charset = utf-8
+indent_style = space
+indent_size = 4
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..37d275b
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,347 @@
+/* eslint max-lines: 'off' */
+
+module.exports = {
+    'env': {
+        'browser': true,
+        'commonjs': true,
+        'es2020': true
+    },
+    'extends': [
+        'eslint:recommended',
+        'plugin:node/recommended'
+    ],
+    'parserOptions': {
+        'ecmaVersion': 11
+    },
+    'rules': {
+        'accessor-pairs': 'error',
+        'array-bracket-newline': 'error',
+        'array-bracket-spacing': 'error',
+        'array-callback-return': 'error',
+        'array-element-newline': ['error', 'consistent'],
+        'arrow-body-style': 'error',
+        'arrow-parens': [
+            'error',
+            'as-needed'
+        ],
+        'arrow-spacing': [
+            'error',
+            {
+                'after': true,
+                'before': true
+            }
+        ],
+        'block-scoped-var': 'error',
+        'block-spacing': 'error',
+        'brace-style': 'off',
+        'callback-return': 'error',
+        'camelcase': 'error',
+        'capitalized-comments': [
+            'error',
+            'always'
+        ],
+        'class-methods-use-this': 'error',
+        'comma-dangle': 'error',
+        'comma-spacing': [
+            'error',
+            {
+                'after': true,
+                'before': false
+            }
+        ],
+        'comma-style': [
+            'error',
+            'last'
+        ],
+        'complexity': 'error',
+        'computed-property-spacing': [
+            'error',
+            'never'
+        ],
+        'consistent-return': 'off',
+        'consistent-this': 'error',
+        'curly': 'error',
+        'default-case': 'error',
+        'default-case-last': 'error',
+        'default-param-last': 'error',
+        'dot-location': 'error',
+        'dot-notation': 'error',
+        'eol-last': 'error',
+        'eqeqeq': 'error',
+        'func-call-spacing': 'error',
+        'func-name-matching': 'error',
+        'func-names': 'error',
+        'func-style': [
+            'error',
+            'declaration'
+        ],
+        'function-call-argument-newline': [
+            'error',
+            'consistent'
+        ],
+        'function-paren-newline': 'error',
+        'generator-star-spacing': 'error',
+        'global-require': 'off',
+        'grouped-accessor-pairs': 'error',
+        'guard-for-in': 'off',
+        'handle-callback-err': 'error',
+        'id-blacklist': 'error',
+        'id-denylist': 'error',
+        'id-length': 'off',
+        'id-match': 'error',
+        'implicit-arrow-linebreak': [
+            'error',
+            'beside'
+        ],
+        'indent': [
+            'error',
+            4
+        ],
+        'indent-legacy': 'off',
+        'init-declarations': 'off',
+        'jsx-quotes': 'error',
+        'key-spacing': 'error',
+        'keyword-spacing': [
+            'error',
+            {
+                'after': true,
+                'before': true
+            }
+        ],
+        'line-comment-position': 'off',
+        'linebreak-style': [
+            'error',
+            'unix'
+        ],
+        'lines-around-comment': 'error',
+        'lines-around-directive': 'error',
+        'lines-between-class-members': 'error',
+        'max-classes-per-file': 'error',
+        'max-depth': 'error',
+        'max-len': ['error', 120],
+        'max-lines': 'error',
+        'max-lines-per-function': 'off',
+        'max-nested-callbacks': 'error',
+        'max-params': 'off',
+        'max-statements': 'off',
+        'max-statements-per-line': 'error',
+        'multiline-comment-style': 'error',
+        'new-cap': 'error',
+        'new-parens': 'error',
+        'newline-after-var': 'off',
+        'newline-before-return': 'off',
+        'newline-per-chained-call': 'off',
+        'no-alert': 'error',
+        'no-array-constructor': 'error',
+        'no-await-in-loop': 'error',
+        'no-bitwise': 'off',
+        'no-buffer-constructor': 'error',
+        'no-caller': 'error',
+        'no-catch-shadow': 'error',
+        'no-confusing-arrow': 'error',
+        'no-console': 'error',
+        'no-constructor-return': 'error',
+        'no-continue': 'error',
+        'no-div-regex': 'error',
+        'no-duplicate-imports': 'error',
+        'no-else-return': 'error',
+        'no-empty-function': 'error',
+        'no-eq-null': 'error',
+        'no-eval': 'error',
+        'no-extend-native': 'error',
+        'no-extra-bind': 'error',
+        'no-extra-label': 'error',
+        'no-extra-parens': 'off',
+        'no-floating-decimal': 'error',
+        'no-implicit-globals': 'error',
+        'no-implied-eval': 'error',
+        'no-inline-comments': 'off',
+        'no-invalid-this': 'error',
+        'no-iterator': 'error',
+        'no-label-var': 'error',
+        'no-labels': 'error',
+        'no-lone-blocks': 'error',
+        'no-lonely-if': 'error',
+        'no-loop-func': 'error',
+        'no-loss-of-precision': 'error',
+        'no-magic-numbers': 'off',
+        'no-mixed-operators': 'error',
+        'no-mixed-requires': 'error',
+        'no-multi-assign': 'error',
+        'no-multi-spaces': 'error',
+        'no-multi-str': 'error',
+        'no-multiple-empty-lines': 'error',
+        'no-native-reassign': 'error',
+        'no-negated-condition': 'off',
+        'no-negated-in-lhs': 'error',
+        'no-nested-ternary': 'off',
+        'no-new': 'error',
+        'no-new-func': 'error',
+        'no-new-object': 'error',
+        'no-new-require': 'error',
+        'no-new-wrappers': 'error',
+        'no-octal-escape': 'error',
+        'no-param-reassign': 'off',
+        'no-path-concat': 'error',
+        'no-plusplus': [
+            'error',
+            {
+                'allowForLoopAfterthoughts': true
+            }
+        ],
+        'no-process-env': 'error',
+        'no-process-exit': 'error',
+        'no-promise-executor-return': 'error',
+        'no-proto': 'error',
+        'no-restricted-exports': 'error',
+        'no-restricted-globals': 'error',
+        'no-restricted-imports': 'error',
+        'no-restricted-modules': 'error',
+        'no-restricted-properties': 'error',
+        'no-restricted-syntax': 'error',
+        'no-return-assign': 'off',
+        'no-return-await': 'off',
+        'no-script-url': 'error',
+        'no-self-compare': 'error',
+        'no-sequences': 'error',
+        'no-shadow': 'off',
+        'no-spaced-func': 'error',
+        'no-sync': 'error',
+        'no-tabs': 'error',
+        'no-template-curly-in-string': 'error',
+        'no-ternary': 'off',
+        'no-throw-literal': 'error',
+        'no-trailing-spaces': 'error',
+        'no-undef-init': 'error',
+        'no-undefined': 'off',
+        'no-underscore-dangle': 'off',
+        'no-unmodified-loop-condition': 'error',
+        'no-unneeded-ternary': 'error',
+        'no-unreachable-loop': 'error',
+        'no-unused-expressions': 'error',
+        'no-use-before-define': 'off',
+        'no-useless-backreference': 'error',
+        'no-useless-call': 'error',
+        'no-useless-computed-key': 'error',
+        'no-useless-concat': 'error',
+        'no-useless-constructor': 'error',
+        'no-useless-rename': 'error',
+        'no-useless-return': 'error',
+        'no-var': 'error',
+        'no-void': 'error',
+        'no-warning-comments': 'off',
+        'no-whitespace-before-property': 'error',
+        'node/exports-style': [
+            'error',
+            'module.exports'
+        ],
+        'node/file-extension-in-import': [
+            'error',
+            'always'
+        ],
+        'node/global-require': 'error',
+        'node/no-mixed-requires': 'error',
+        'node/prefer-global/console': [
+            'error',
+            'always'
+        ],
+        'node/prefer-promises/fs': 'error',
+        'nonblock-statement-body-position': 'error',
+        'object-curly-newline': 'error',
+        'object-curly-spacing': [
+            'error',
+            'always'
+        ],
+        'object-shorthand': 'error',
+        'one-var': 'off',
+        'one-var-declaration-per-line': 'error',
+        'operator-assignment': [
+            'error',
+            'always'
+        ],
+        'operator-linebreak': 'error',
+        'padded-blocks': 'off',
+        'padding-line-between-statements': 'error',
+        'prefer-arrow-callback': 'error',
+        'prefer-const': 'error',
+        'prefer-destructuring': 'off',
+        'prefer-exponentiation-operator': 'error',
+        'prefer-named-capture-group': 'off',
+        'prefer-numeric-literals': 'error',
+        'prefer-object-spread': 'error',
+        'prefer-promise-reject-errors': 'error',
+        'prefer-reflect': 'off',
+        'prefer-regex-literals': 'error',
+        'prefer-rest-params': 'error',
+        'prefer-spread': 'error',
+        'prefer-template': 'off',
+        'quote-props': 'off',
+        'quotes': [
+            'error',
+            'single'
+        ],
+        'radix': [
+            'error',
+            'as-needed'
+        ],
+        'require-atomic-updates': 'off',
+        'require-await': 'off',
+        'require-jsdoc': 'off',
+        'require-unicode-regexp': 'error',
+        'rest-spread-spacing': [
+            'error',
+            'never'
+        ],
+        'semi': 'off',
+        'semi-spacing': [
+            'error',
+            {
+                'after': true,
+                'before': false
+            }
+        ],
+        'semi-style': [
+            'error',
+            'last'
+        ],
+        'sort-imports': 'error',
+        'sort-keys': 'off',
+        'sort-vars': 'error',
+        'space-before-blocks': 'error',
+        'space-before-function-paren': 'off',
+        'space-in-parens': [
+            'error',
+            'never'
+        ],
+        'space-infix-ops': 'error',
+        'space-unary-ops': 'error',
+        'spaced-comment': [
+            'error',
+            'always'
+        ],
+        'strict': [
+            'error',
+            'never'
+        ],
+        'switch-colon-spacing': 'error',
+        'symbol-description': 'error',
+        'template-curly-spacing': [
+            'error',
+            'never'
+        ],
+        'template-tag-spacing': 'error',
+        'unicode-bom': [
+            'error',
+            'never'
+        ],
+        'valid-jsdoc': 'error',
+        'vars-on-top': 'error',
+        'wrap-iife': 'error',
+        'wrap-regex': 'error',
+        'yield-star-spacing': 'error',
+        'yoda': [
+            'error',
+            'never'
+        ]
+    }
+};
diff --git a/bin/fetch.js b/bin/fetch.js
index 70078ac..1905519 100755
--- a/bin/fetch.js
+++ b/bin/fetch.js
@@ -1,5 +1,8 @@
 #!/usr/bin/env node
 
+/* eslint no-console: off */
+/* eslint no-unused-vars: off */
+
 const pronote = require('..');
 
 if (process.argv.length < 5) {
diff --git a/bin/server.js b/bin/server.js
index 234db3c..366d03e 100755
--- a/bin/server.js
+++ b/bin/server.js
@@ -1,5 +1,8 @@
 #!/usr/bin/env node
 
+/* eslint no-console: off */
+/* eslint no-unused-vars: off */
+
 const pronote = require('..');
 
 if (process.argv.length < 5) {
diff --git a/index.js b/index.js
index 980e23a..f689b8a 100644
--- a/index.js
+++ b/index.js
@@ -8,7 +8,7 @@ const { cipher, decipher } = require('./src/cipher');
 const { getStart, auth } = require('./src/auth');
 
 const getParams = require('./src/fetch/params');
-const { getId, getAuthKey }  = require('./src/fetch/auth');
+const { getId, getAuthKey } = require('./src/fetch/auth');
 const getUser = require('./src/fetch/user');
 const { getFilledDaysAndWeeks, getTimetable } = require('./src/fetch/timetable');
 
@@ -22,7 +22,7 @@ module.exports = {
     login,
     errors,
 
-    // Low-level API (if you need to use this, you can, but it may mean I've forgotten a use case, please open an issue!)
+    // Low-level API (you can use this if you need, but it may mean I've forgotten a use case, please open an issue!)
     createSession,
     cipher, decipher,
     getStart, auth,
diff --git a/package-lock.json b/package-lock.json
index a88fb93..48e73a8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,51 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.10.4.tgz",
+      "integrity": "sha512-vG6SvB6oYEhvgisZNFRmRCUkLz11c7rp+tbNTynGqc6mS1d5ATd/sGyV6W0KZZnXRKMTzZDRgQT3Ou9jhpAfUg==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.10.4"
+      }
+    },
+    "@babel/helper-validator-identifier": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.10.4.tgz",
+      "integrity": "sha512-3U9y+43hz7ZM+rzG24Qe2mufW5KhvFg/NhnNph+i9mgCtdTCtMJuI1TMkrIUiK7Ix4PYlRF9I5dhqaLYA/ADXw==",
+      "dev": true
+    },
+    "@babel/highlight": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.10.4.tgz",
+      "integrity": "sha512-i6rgnR/YgPEQzZZnbTHHuZdlE8qyoBNalD6F+q4vAFlcMEcqmkoG+mPqJYJCo63qPf74+Y1UZsl3l6f7/RIkmA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-validator-identifier": "^7.10.4",
+        "chalk": "^2.0.0",
+        "js-tokens": "^4.0.0"
+      },
+      "dependencies": {
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        }
+      }
+    },
+    "@types/color-name": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
+      "integrity": "sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==",
+      "dev": true
+    },
     "@types/node-forge": {
       "version": "0.6.11",
       "resolved": "https://registry.npmjs.org/@types/node-forge/-/node-forge-0.6.11.tgz",
@@ -16,6 +61,66 @@
       "integrity": "sha512-GdZbRSJ3Cv5fiwT6I0SQ3ckeN2PWNqxd26W9Z2fCK1tGrrasGy4puvNFtnddqH9UJFMQYXxEuuB7B8UK+LLwSg==",
       "dev": true
     },
+    "acorn": {
+      "version": "7.4.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.0.tgz",
+      "integrity": "sha512-+G7P8jJmCHr+S+cLfQxygbWhXy+8YTVGzAkpEbcLo2mLoL7tij/VG41QSHACSf5QgYRhMZYHuNc6drJaO0Da+w==",
+      "dev": true
+    },
+    "acorn-jsx": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.2.0.tgz",
+      "integrity": "sha512-HiUX/+K2YpkpJ+SzBffkM/AQ2YE03S0U1kjTLVpoJdhZMOWy8qvXVN9JdLqv2QsaQ6MPYQIuNmwD8zOiYUofLQ==",
+      "dev": true
+    },
+    "ajv": {
+      "version": "6.12.3",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.3.tgz",
+      "integrity": "sha512-4K0cK3L1hsqk9xIb2z9vs/XU+PGJZ9PNpJRDS9YLzmNdX6jmVPfamLvTJr0aDAusnHyCHO6MjzlkAsgtqp9teA==",
+      "dev": true,
+      "requires": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      }
+    },
+    "ansi-colors": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz",
+      "integrity": "sha512-JoX0apGbHaUJBNl6yF+p6JAFYZ666/hhCGKN5t9QFjbJQKUU/g8MNbFDbvfrgKXvI1QpZplPOnwIo99lX/AAmA==",
+      "dev": true
+    },
+    "ansi-regex": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
+      "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
+      "dev": true
+    },
+    "ansi-styles": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "dev": true,
+      "requires": {
+        "color-convert": "^1.9.0"
+      }
+    },
+    "argparse": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+      "dev": true,
+      "requires": {
+        "sprintf-js": "~1.0.2"
+      }
+    },
+    "astral-regex": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-1.0.0.tgz",
+      "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==",
+      "dev": true
+    },
     "axios": {
       "version": "0.19.2",
       "resolved": "https://registry.npmjs.org/axios/-/axios-0.19.2.tgz",
@@ -24,6 +129,112 @@
         "follow-redirects": "1.5.10"
       }
     },
+    "balanced-match": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "dev": true
+    },
+    "brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dev": true,
+      "requires": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "callsites": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
+      "integrity": "sha512-P8BjAsXvZS+VIDUI11hHCQEv74YT67YUi5JJFNWIqL235sBmjX4+qx9Muvls5ivyNENctx46xQLQ3aTuE7ssaQ==",
+      "dev": true
+    },
+    "chalk": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.0.tgz",
+      "integrity": "sha512-qwx12AxXe2Q5xQ43Ac//I6v5aXTipYrSESdOgzrN+9XjgEpyjpKuvSGaN4qE93f7TQTlerQQ8S+EQ0EyDoVL1A==",
+      "dev": true,
+      "requires": {
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "4.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.2.1.tgz",
+          "integrity": "sha512-9VGjrMsG1vePxcSweQsN20KY/c4zN0h9fLjqAbwbPfahM3t+NL+M9HC8xeXG2I8pX5NoamTGNuomEUFI7fcUjA==",
+          "dev": true,
+          "requires": {
+            "@types/color-name": "^1.1.1",
+            "color-convert": "^2.0.1"
+          }
+        },
+        "color-convert": {
+          "version": "2.0.1",
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diff --git a/package.json b/package.json
index 5abd795..cdcd80a 100644
--- a/package.json
+++ b/package.json
@@ -1,35 +1,43 @@
 {
-  "name": "pronote-api",
-  "version": "2.0.0",
-  "description": "Pronote 2020/2021 API (Node.JS/TS library, and HTTP server)",
-  "main": "index.js",
-  "types": "index.d.ts",
-  "scripts": {
-    "start": "node ./bin/server.js"
-  },
-  "keywords": [
-    "pronote",
-    "api",
-    "http",
-    "2020"
-  ],
-  "author": "Adrien 'Litarvan' Navratil <adrien1975@live.fr>",
-  "license": "MIT",
-  "repository": {
-    "url": "https://github.com/Litarvan/pronote-api.git",
-    "type": "git"
-  },
-  "bin": {
-    "pronote-api-server": "./bin/server.js",
-    "pronote-fetch": "./bin/fetch.js"
-  },
-  "dependencies": {
-    "axios": "^0.19",
-    "node-forge": "0.6.33",
-    "pako": "^1.0"
-  },
-  "devDependencies": {
-    "@types/node-forge": "^0.6",
-    "@types/pako": "^1.0"
-  }
+    "name": "pronote-api",
+    "version": "2.0.0",
+    "description": "Pronote 2020/2021 API (Node.JS/TS library, and HTTP server)",
+    "main": "index.js",
+    "types": "index.d.ts",
+    "type": "commonjs",
+    "engines": {
+        "node": ">=11.14.0"
+    },
+    "scripts": {
+        "start": "node ./bin/server.js",
+        "lint": "eslint src/* bin/* index.js",
+        "check": "eslint --fix src/* bin/* index.js"
+    },
+    "keywords": [
+        "pronote",
+        "api",
+        "http",
+        "2020"
+    ],
+    "author": "Adrien 'Litarvan' Navratil <adrien1975@live.fr>",
+    "license": "MIT",
+    "repository": {
+        "url": "https://github.com/Litarvan/pronote-api.git",
+        "type": "git"
+    },
+    "bin": {
+        "pronote-api-server": "./bin/server.js",
+        "pronote-fetch": "./bin/fetch.js"
+    },
+    "dependencies": {
+        "axios": "^0.19",
+        "node-forge": "0.6.33",
+        "pako": "^1.0"
+    },
+    "devDependencies": {
+        "@types/node-forge": "^0.6",
+        "@types/pako": "^1.0",
+        "eslint": "^7.6.0",
+        "eslint-plugin-node": "^11.1.0"
+    }
 }
diff --git a/src/auth.js b/src/auth.js
index fae3e7f..157e1a6 100644
--- a/src/auth.js
+++ b/src/auth.js
@@ -50,6 +50,7 @@ async function getStart(url, username, password, cas)
         throw errors.UNKNOWN_CAS.drop(cas);
     }
 
+    // eslint-disable-next-line node/global-require
     return await require(casPath)(url, username, password);
 }
 
diff --git a/src/cas/api.js b/src/cas/api.js
index 44a5b9b..fa104ca 100644
--- a/src/cas/api.js
+++ b/src/cas/api.js
@@ -6,15 +6,15 @@ function extractStart(html)
         throw errors.BANNED.drop();
     }
 
-    html = html.replace(new RegExp(' ', 'g'), '').replace(new RegExp('\n', 'g'), '');
+    html = html.replace(/ /ug, '').replace(/\n/ug, '');
 
-    const from = "Start(";
-    const to = ")}catch";
+    const from = 'Start(';
+    const to = ')}catch';
 
     const start = html.substring(html.indexOf(from) + from.length, html.indexOf(to));
-    const json = start
-        .replace(/(['"])?([a-z0-9A-Z_]+)(['"])?:/g, '"$2": ')
-        .replace(/'/g, '"');
+    const json = start.
+        replace(/(['"])?([a-z0-9A-Z_]+)(['"])?:/gu, '"$2": ').
+        replace(/'/gu, '"');
 
     return JSON.parse(json);
 }
diff --git a/src/cipher.js b/src/cipher.js
index b856eac..da491c1 100644
--- a/src/cipher.js
+++ b/src/cipher.js
@@ -1,4 +1,5 @@
 const forge = require('node-forge');
+const pako = require('pako');
 
 function initCipher(session, keyModulus, keyExponent)
 {
@@ -102,8 +103,10 @@ function getUUID(session, iv)
 
 function getLoginKey(username, password, scramble, fromCas)
 {
-    const hash = forge.md.sha256.create().update(scramble || '').update(forge.util.encodeUtf8(password)).digest().toHex();
-    return new forge.util.ByteBuffer(forge.util.encodeUtf8((fromCas ? '' : username.toLowerCase()) + hash.toUpperCase()));
+    const hash = forge.md.sha256.create().update(scramble || '').update(forge.util.encodeUtf8(password)).digest();
+    const key = (fromCas ? '' : username.toLowerCase()) + hash.toHex().toUpperCase();
+
+    return new forge.util.ByteBuffer(forge.util.encodeUtf8(key));
 }
 
 module.exports = {
diff --git a/src/data/types.js b/src/data/types.js
index 18eb820..e8abf8c 100644
--- a/src/data/types.js
+++ b/src/data/types.js
@@ -30,7 +30,7 @@ function parseRange(str)
 
     for (const val of content) {
         if (val.includes('..')) {
-            let index = val.indexOf('..');
+            const index = val.indexOf('..');
             for (let i = ~~val.substring(0, index); i <= ~~val.substring(index + 2); i++) {
                 result.push(i);
             }
@@ -48,20 +48,20 @@ function parse({ _T: type, V: value } = {})
         return value;
     }
 
-    switch (type)
-    {
-        case 7:
-            return parseDate(value);
-        case 8: // ?
-        case 11: // ?
-        case 26: // ?
-            return parseRange(value);
-        case 10: // Mark / Number
-            return ~~value;
-        case 23: // URL
-        case 24: // Object (includes Array)
-        case 25: // Resource
-            return value;
+    switch (type) {
+    case 7:
+        return parseDate(value);
+    case 8: // ?
+    case 11: // ?
+    case 26: // ?
+        return parseRange(value);
+    case 10: // Mark / Number
+        return ~~value;
+    case 23: // URL
+    case 24: // Object (includes Array)
+    case 25: // Resource
+    default:
+        return value;
     }
 }
 
diff --git a/src/data/weeks.js b/src/data/weeks.js
index a4b6667..f88f2af 100644
--- a/src/data/weeks.js
+++ b/src/data/weeks.js
@@ -1,7 +1,7 @@
 function toPronoteWeek(session, date)
 {
-    const firstWeek = getUTCWeek(session.params.firstDay);
-    const week = getUTCWeek(date);
+    const firstWeek = toUTCWeek(session.params.firstDay);
+    const week = toUTCWeek(date);
 
     if (week >= firstWeek) {
         return week - firstWeek + 1;
@@ -13,7 +13,7 @@ function toPronoteWeek(session, date)
 function toUTCWeek(date)
 {
     const firstDay = new Date((new Date()).getFullYear(), 0, 1);
-    return Math.ceil( (((date - firstDay) / 86400000) + firstDay.getDay() + 1) / 7);
+    return Math.ceil((((date - firstDay) / 86400000) + firstDay.getDay() + 1) / 7);
 }
 
 module.exports = {
diff --git a/src/fetch/navigate.js b/src/fetch/navigate.js
index ebb935e..deb49f5 100644
--- a/src/fetch/navigate.js
+++ b/src/fetch/navigate.js
@@ -29,4 +29,4 @@ async function navigate(session, page, tab, data)
     return result;
 }
 
-module.exports = navigate;
\ No newline at end of file
+module.exports = navigate;
diff --git a/src/fetch/params.js b/src/fetch/params.js
index 730a6e8..06ac963 100644
--- a/src/fetch/params.js
+++ b/src/fetch/params.js
@@ -27,7 +27,10 @@ async function getParams(session, iv)
         versionFull: general.version,
         year: ~~general.millesime,
         language: { id: general.langID, name: general.langue },
-        supportedLanguages: parse(general.listeLangues).map(({ langID, description }) => ({ id: langID, name: description })),
+        supportedLanguages: parse(general.listeLangues).map(({ langID, description }) => ({
+            id: langID,
+            name: description
+        })),
         infoPage: general.lienMentions,
         hasForum: general.avecForum,
         helpURL: parse(general.UrlAide),
@@ -62,30 +65,29 @@ async function getParams(session, iv)
         frequenciesLabels: general.LibellesFrequences,
         defaultMarkMax: parse(general.BaremeNotation),
         allowedAnnotations: parse(general.listeAnnotationsAutorisees),
-        acquisitionLevels: parse(general.ListeNiveauxDAcquisitions).map(
-            ({ L, N, G, listePositionnements, positionJauge, actifPour, abbreviation, raccourci,
-                 couleur, ponderation, nombrePointsBrevet, estAcqui, estNotantPourTxReussite }) => ({
-                id: N,
+        acquisitionLevels: parse(general.ListeNiveauxDAcquisitions).map(({ L, N, G,
+            listePositionnements, positionJauge, actifPour, abbreviation, raccourci,
+            couleur, ponderation, nombrePointsBrevet, estAcqui, estNotantPourTxReussite }) => ({
+            id: N,
+            name: L,
+            count: G,
+
+            positions: parse(listePositionnements).map(({ G, L, abbreviation, abbreviationAvecPrefixe }) => ({
                 name: L,
                 count: G,
-
-                positions: parse(listePositionnements).map(({ G, L, abbreviation, abbreviationAvecPrefixe }) => ({
-                    name: L,
-                    count: G,
-                    shortName: abbreviation,
-                    shortNameWithPrefix: abbreviationAvecPrefixe
-                })),
-                triggerPosition: positionJauge,
-                activeFor: parse(actifPour),
                 shortName: abbreviation,
-                shortPath: raccourci,
-                color: couleur,
-                weighting: parse(ponderation),
-                brevetPoints: parse(nombrePointsBrevet),
-                acquired: estAcqui,
-                countsForSuccess: estNotantPourTxReussite
-            })
-        ),
+                shortNameWithPrefix: abbreviationAvecPrefixe
+            })),
+            triggerPosition: positionJauge,
+            activeFor: parse(actifPour),
+            shortName: abbreviation,
+            shortPath: raccourci,
+            color: couleur,
+            weighting: parse(ponderation),
+            brevetPoints: parse(nombrePointsBrevet),
+            acquired: estAcqui,
+            countsForSuccess: estNotantPourTxReussite
+        })),
         displayAcquisitionShortLabel: general.AfficherAbbreviationNiveauDAcquisition,
         withEvaluationHistory: general.AvecEvaluationHistorique,
         withoutIntermediaryLevelAutoValidation: general.SansValidationNivIntermediairesDsValidAuto,
diff --git a/src/fetch/timetable.js b/src/fetch/timetable.js
index 9f7a729..9b62c02 100644
--- a/src/fetch/timetable.js
+++ b/src/fetch/timetable.js
@@ -1,3 +1,5 @@
+/* eslint no-unused-vars: off */
+
 const request = require('../request');
 
 const parse = require('../data/types');
@@ -18,7 +20,7 @@ async function getTimetable(session, week) {
         avecInfosPrefsGrille: true,
         avecRessourceLibrePiedHoraire: false,
         estEDTPermanence: false,
-        numeroSemaine: week, // *clown emoji*
+        numeroSemaine: week, // *Clown emoji*
         NumeroSemaine: week,
         ressource: student,
         Ressource: student
diff --git a/src/fetch/user.js b/src/fetch/user.js
index 8e95b68..f0cd6e5 100644
--- a/src/fetch/user.js
+++ b/src/fetch/user.js
@@ -50,7 +50,7 @@ async function getUser(session)
             })),
             defaultPeriod: parse(periodeParDefaut).L
         })),
-        establishmentsInfo: parse(user.listeInformationsEtablissements).map(({ L, N, Logo, Coordonnees, avecInformations }) => ({
+        establishmentsInfo: parse(user.listeInformationsEtablissements).map(({ L, N, Logo, Coordonnees }) => ({
             id: N,
             name: L,
             logoID: parse(Logo),
diff --git a/src/http.js b/src/http.js
index 72fc8a7..1aa614e 100644
--- a/src/http.js
+++ b/src/http.js
@@ -2,13 +2,15 @@ const axios = require('axios');
 
 async function http({ url, body, data, method = 'GET', binary, jar = null, followRedirects = true })
 {
-    let params = encodeParams(data);
-    let content = {
+    const params = encodeParams(data);
+    const content = {
         url,
         method: method.toLowerCase(),
         headers: {
             'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0',
-            'Content-Type': body !== undefined ? 'application/json' : (params !== '' && method !== 'GET' ? 'application/x-www-form-urlencoded' : ''),
+            'Content-Type': body !== undefined
+                ? 'application/json'
+                : (params !== '' && method !== 'GET' ? 'application/x-www-form-urlencoded' : ''),
             'Cookie': encodeCookies(jar)
         },
         maxRedirects: 0,
@@ -18,7 +20,7 @@ async function http({ url, body, data, method = 'GET', binary, jar = null, follo
     };
 
     if (binary) {
-        content['responseType'] = 'arraybuffer';
+        content.responseType = 'arraybuffer';
     }
 
     if (params) {
@@ -34,11 +36,11 @@ async function http({ url, body, data, method = 'GET', binary, jar = null, follo
     const response = await axios(content);
     if (response.headers['set-cookie'] && jar !== null)
     {
-        await updateCookies(response, jar);
+        await updateCookies(response, jar, url);
     }
 
-    if (response.headers['location'] && followRedirects) {
-        let location = response.headers['location'];
+    if (response.headers.location && followRedirects) {
+        let location = response.headers.location;
         if (!location.startsWith('http')) {
             location = getOrigin(url) + location;
         }
@@ -76,18 +78,18 @@ function encodeParams(data)
 
     let params = '';
     for (const k in Object.keys(data)) {
-        let v = data[k];
+        const v = data[k];
         params += `${k}=${encodeURIComponent(v)}&`
     }
 
     return params.substring(0, params.length - 1)
 }
 
-function updateCookies(response, jar)
+function updateCookies(response, jar, url)
 {
     return new Promise((accept, reject) => {
         response.headers['set-cookie'].forEach(cookie => {
-            jar.setCookie(cookie, url, (err, _) => err ? reject(err) : accept());
+            jar.setCookie(cookie, url, err => (err ? reject(err) : accept()));
         });
     });
 }
diff --git a/src/session.js b/src/session.js
index f2c2b9a..d2069dc 100644
--- a/src/session.js
+++ b/src/session.js
@@ -52,11 +52,11 @@ function getTarget(type)
     let name;
     switch (type)
     {
-        case 3:
-            name = 'eleve';
-            break;
-        default:
-            name = 'unknown';
+    case 3:
+        name = 'eleve';
+        break;
+    default:
+        name = 'unknown';
     }
 
     return { name, id: type };
diff --git a/src/timetable.js b/src/timetable.js
index c0ac85c..0e0466e 100644
--- a/src/timetable.js
+++ b/src/timetable.js
@@ -1,3 +1,5 @@
+/* eslint no-unused-vars: off */
+
 const { toPronoteWeek } = require('./data/weeks');
 const { getFilledDaysAndWeeks, getTimetable } = require('./fetch/timetable');