diff --git a/.eslintrc.js b/.eslintrc.js
index fc7090b..aabf974 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -31,7 +31,7 @@ module.exports = {
             "windows"
         ],
         "quotes": [
-            "error",
+            "warn",
             "double"
         ],
         "semi": [
@@ -45,6 +45,20 @@ module.exports = {
                 "args": "after-used",
                 "ignoreRestSiblings": false
             }
-        ]
+        ],
+        "prefer-const": "warn",
+        "no-var": "error",
+        "no-multiple-empty-lines": ["error", { "max": 2, "maxEOF": 1, "maxBOF": 0 }],
+        "no-lonely-if": "error",
+        "no-empty-function": "error",
+        "no-inline-comments": "error",
+        "no-trailing-spaces": ["error"],
+        "arrow-spacing": ["warn", { "before": true, "after": true }],
+        "space-before-function-paren": ["error", {
+            "anonymous": "never",
+            "named": "never",
+            "asyncArrow": "always"
+        }],
+        "comma-spacing": "error",
     }
 }
diff --git a/src/commands/ban.js b/src/commands/ban.js
index 7a75326..1364bb0 100644
--- a/src/commands/ban.js
+++ b/src/commands/ban.js
@@ -38,7 +38,7 @@ module.exports = {
 
     /** @param { import('discord.js').ChatInputCommandInteraction } interaction */
 
-    async execute (interaction) {
+    async execute(interaction) {
 
         await interaction.deferReply()
 
diff --git a/src/commands/check.js b/src/commands/check.js
index 25034b0..cdcf266 100644
--- a/src/commands/check.js
+++ b/src/commands/check.js
@@ -7,6 +7,7 @@ module.exports = {
     name: "check",
     description: "Check a player's stats.",
     type: "slash",
+    dev: true,
 
     data: new SlashCommandBuilder()
         .setName("check")
diff --git a/src/commands/setnick.js b/src/commands/setnick.js
index 37ce70a..a727ce9 100644
--- a/src/commands/setnick.js
+++ b/src/commands/setnick.js
@@ -38,4 +38,4 @@ module.exports = {
         await interaction.reply({ content: "Set the nickname of " + userMention(member.id) + " to " + nickname, ephemeral: true })
 
     }
-} 
+}
diff --git a/src/events/buttons/waitingListUpdate.js b/src/events/buttons/waitingListUpdate.js
index 8e12b4e..010e09d 100644
--- a/src/events/buttons/waitingListUpdate.js
+++ b/src/events/buttons/waitingListUpdate.js
@@ -30,7 +30,7 @@ module.exports = {
 
         }
 
-        let fields = []
+        const fields = []
 
         for (let i = 0; i < accepted.length; i++) {
 
diff --git a/src/utils/functions/bedwars.js b/src/utils/functions/bedwars.js
index 4f744cc..3b23b76 100644
--- a/src/utils/functions/bedwars.js
+++ b/src/utils/functions/bedwars.js
@@ -4,7 +4,7 @@
 function getExpForLevel(level) {
     if (level == 0) return 0
 
-    let respectedLevel = getLevelRespectingPrestige(level)
+    const respectedLevel = getLevelRespectingPrestige(level)
     if (respectedLevel > EASY_LEVELS) {
         return 5000
     }
@@ -37,12 +37,12 @@ const XP_PER_PRESTIGE = 96 * 5000 + EASY_LEVELS_XP
 const LEVELS_PER_PRESTIGE = 100
 const HIGHEST_PRESTIGE = 50
 function bedwarsLevel(exp) {
-    let prestiges = Math.floor(exp / XP_PER_PRESTIGE)
+    const prestiges = Math.floor(exp / XP_PER_PRESTIGE)
     let level = prestiges * LEVELS_PER_PRESTIGE
     let expWithoutPrestiges = exp - (prestiges * XP_PER_PRESTIGE)
 
     for (let i = 1; i <= EASY_LEVELS; ++i) {
-        let expForEasyLevel = getExpForLevel(i)
+        const expForEasyLevel = getExpForLevel(i)
         if (expWithoutPrestiges < expForEasyLevel) {
             break
         }
diff --git a/src/utils/functions/skywars.js b/src/utils/functions/skywars.js
index 3c2baf0..38e2cd0 100644
--- a/src/utils/functions/skywars.js
+++ b/src/utils/functions/skywars.js
@@ -2,7 +2,7 @@
     Code used from the slothpixel project https://github.com/slothpixel/core
 */
 function skywarsLevel(xp) {
-    let xps = [0, 20, 70, 150, 250, 500, 1000, 2000, 3500, 6000, 10000, 15000]
+    const xps = [0, 20, 70, 150, 250, 500, 1000, 2000, 3500, 6000, 10000, 15000]
     let exactLevel = 0
     if (xp >= 15000) {
         exactLevel = (xp - 15000) / 10000 + 12