diff --git a/package.json b/package.json
index f693c27f1..721dc662c 100644
--- a/package.json
+++ b/package.json
@@ -35,19 +35,19 @@
   "runkitExampleFilename": "./docs/examples/ping.js",
   "unpkg": "./webpack/discord.min.js",
   "dependencies": {
-    "@discordjs/collection": "^0.1.1",
+    "@discordjs/collection": "^0.1.5",
     "abort-controller": "^3.0.0",
-    "form-data": "^2.3.3",
-    "node-fetch": "^2.3.0",
-    "prism-media": "^1.0.0",
+    "form-data": "^3.0.0",
+    "node-fetch": "^2.6.0",
+    "prism-media": "^1.2.0",
     "setimmediate": "^1.0.5",
-    "tweetnacl": "^1.0.1",
-    "ws": "^7.2.0"
+    "tweetnacl": "^1.0.3",
+    "ws": "^7.2.1"
   },
   "peerDependencies": {
     "bufferutil": "^4.0.1",
     "erlpack": "discordapp/erlpack",
-    "libsodium-wrappers": "^0.7.4",
+    "libsodium-wrappers": "^0.7.6",
     "sodium": "^3.0.2",
     "utf-8-validate": "^5.0.2",
     "zlib-sync": "^0.1.6"
@@ -74,20 +74,20 @@
   },
   "devDependencies": {
     "@types/node": "^10.12.24",
-    "@types/ws": "^6.0.1",
+    "@types/ws": "^7.2.1",
     "discord.js-docgen": "discordjs/docgen",
     "dtslint": "^3.0.0",
-    "eslint": "^5.13.0",
-    "jest": "^24.7.1",
+    "eslint": "^6.8.0",
+    "jest": "^25.1.0",
     "json-filter-loader": "^1.0.0",
     "terser-webpack-plugin": "^1.2.2",
-    "tslint": "^5.12.1",
-    "typescript": "^3.3.3",
-    "webpack": "^4.29.3",
-    "webpack-cli": "^3.2.3"
+    "tslint": "^6.0.0",
+    "typescript": "^3.8.2",
+    "webpack": "^4.41.6",
+    "webpack-cli": "^3.3.11"
   },
   "engines": {
-    "node": ">=11.0.0"
+    "node": ">=12.0.0"
   },
   "browser": {
     "@discordjs/opus": false,
diff --git a/src/client/voice/util/VolumeInterface.js b/src/client/voice/util/VolumeInterface.js
index ba162a947..179d4fb78 100644
--- a/src/client/voice/util/VolumeInterface.js
+++ b/src/client/voice/util/VolumeInterface.js
@@ -106,7 +106,7 @@ exports.applyToClass = function applyToClass(structure) {
     Object.defineProperty(
       structure.prototype,
       prop,
-      Object.getOwnPropertyDescriptor(VolumeInterface.prototype, prop)
+      Object.getOwnPropertyDescriptor(VolumeInterface.prototype, prop),
     );
   }
 };
diff --git a/src/client/websocket/handlers/GUILD_CREATE.js b/src/client/websocket/handlers/GUILD_CREATE.js
index eb8974435..9994d9f84 100644
--- a/src/client/websocket/handlers/GUILD_CREATE.js
+++ b/src/client/websocket/handlers/GUILD_CREATE.js
@@ -11,7 +11,7 @@ module.exports = async (client, { d: data }, shard) => {
       // If the client was ready before and we had unavailable guilds, fetch them
       if (client.ws.status === Status.READY && client.options.fetchAllMembers) {
         await guild.members.fetch().catch(err =>
-          client.emit(Events.DEBUG, `Failed to fetch all members: ${err}\n${err.stack}`)
+          client.emit(Events.DEBUG, `Failed to fetch all members: ${err}\n${err.stack}`),
         );
       }
     }
@@ -27,7 +27,7 @@ module.exports = async (client, { d: data }, shard) => {
        */
       if (client.options.fetchAllMembers) {
         await guild.members.fetch().catch(err =>
-          client.emit(Events.DEBUG, `Failed to fetch all members: ${err}\n${err.stack}`)
+          client.emit(Events.DEBUG, `Failed to fetch all members: ${err}\n${err.stack}`),
         );
       }
       client.emit(Events.GUILD_CREATE, guild);
diff --git a/src/rest/RequestHandler.js b/src/rest/RequestHandler.js
index 8f650b42a..8a8ecf9a7 100644
--- a/src/rest/RequestHandler.js
+++ b/src/rest/RequestHandler.js
@@ -103,7 +103,7 @@ class RequestHandler {
       // NodeFetch error expected for all "operational" errors, such as 500 status code
       this.busy = false;
       return reject(
-        new HTTPError(error.message, error.constructor.name, error.status, request.method, request.path)
+        new HTTPError(error.message, error.constructor.name, error.status, request.method, request.path),
       );
     }
 
@@ -155,7 +155,7 @@ class RequestHandler {
       // Retry the specified number of times for possible serverside issues
       if (item.retries === this.manager.client.options.retryLimit) {
         return reject(
-          new HTTPError(res.statusText, res.constructor.name, res.status, item.request.method, request.path)
+          new HTTPError(res.statusText, res.constructor.name, res.status, item.request.method, request.path),
         );
       } else {
         item.retries++;
@@ -172,7 +172,7 @@ class RequestHandler {
         return null;
       } catch (err) {
         return reject(
-          new HTTPError(err.message, err.constructor.name, err.status, request.method, request.path)
+          new HTTPError(err.message, err.constructor.name, err.status, request.method, request.path),
         );
       }
     }
diff --git a/src/sharding/Shard.js b/src/sharding/Shard.js
index 04d224db4..7e016fbee 100644
--- a/src/sharding/Shard.js
+++ b/src/sharding/Shard.js
@@ -294,7 +294,7 @@ class Shard extends EventEmitter {
       if (message._sFetchProp) {
         this.manager.fetchClientValues(message._sFetchProp).then(
           results => this.send({ _sFetchProp: message._sFetchProp, _result: results }),
-          err => this.send({ _sFetchProp: message._sFetchProp, _error: Util.makePlainError(err) })
+          err => this.send({ _sFetchProp: message._sFetchProp, _error: Util.makePlainError(err) }),
         );
         return;
       }
@@ -303,7 +303,7 @@ class Shard extends EventEmitter {
       if (message._sEval) {
         this.manager.broadcastEval(message._sEval).then(
           results => this.send({ _sEval: message._sEval, _result: results }),
-          err => this.send({ _sEval: message._sEval, _error: Util.makePlainError(err) })
+          err => this.send({ _sEval: message._sEval, _error: Util.makePlainError(err) }),
         );
         return;
       }
diff --git a/src/structures/Guild.js b/src/structures/Guild.js
index fc04530c9..9353f4de5 100644
--- a/src/structures/Guild.js
+++ b/src/structures/Guild.js
@@ -616,7 +616,7 @@ class Guild extends Base {
           user: this.client.users.add(ban.user),
         });
         return collection;
-      }, new Collection())
+      }, new Collection()),
     );
   }
 
@@ -634,7 +634,7 @@ class Guild extends Base {
     return this.client.api.guilds(this.id).integrations.get().then(data =>
       data.reduce((collection, integration) =>
         collection.set(integration.id, new Integration(this.client, integration, this)),
-      new Collection())
+      new Collection()),
     );
   }
 
@@ -1086,7 +1086,7 @@ class Guild extends Base {
       this.client.actions.GuildChannelsPositionUpdate.handle({
         guild_id: this.id,
         channels: updatedChannels,
-      }).guild
+      }).guild,
     );
   }
 
@@ -1120,7 +1120,7 @@ class Guild extends Base {
       this.client.actions.GuildRolePositionUpdate.handle({
         guild_id: this.id,
         roles: rolePositions,
-      }).guild
+      }).guild,
     );
   }
 
@@ -1250,7 +1250,7 @@ class Guild extends Base {
   _sortedChannels(channel) {
     const category = channel.type === ChannelTypes.CATEGORY;
     return Util.discordSort(this.channels.cache.filter(c =>
-      c.type === channel.type && (category || c.parent === channel.parent)
+      c.type === channel.type && (category || c.parent === channel.parent),
     ));
   }
 }
diff --git a/src/structures/GuildChannel.js b/src/structures/GuildChannel.js
index 649e5b222..35a0bc2ab 100644
--- a/src/structures/GuildChannel.js
+++ b/src/structures/GuildChannel.js
@@ -375,6 +375,7 @@ class GuildChannel extends Channel {
    */
   setParent(channel, { lockPermissions = true, reason } = {}) {
     return this.edit({
+      // eslint-disable-next-line no-prototype-builtins
       parentID: channel !== null ? channel.hasOwnProperty('id') ? channel.id : channel : null,
       lockPermissions,
     }, reason);
diff --git a/src/structures/Message.js b/src/structures/Message.js
index 0c856fdae..d32e1c017 100644
--- a/src/structures/Message.js
+++ b/src/structures/Message.js
@@ -108,7 +108,7 @@ class Message extends Base {
     if (data.attachments) {
       for (const attachment of data.attachments) {
         this.attachments.set(attachment.id, new MessageAttachment(
-          attachment.url, attachment.filename, attachment
+          attachment.url, attachment.filename, attachment,
         ));
       }
     }
@@ -230,7 +230,7 @@ class Message extends Base {
       this.attachments = new Collection();
       for (const attachment of data.attachments) {
         this.attachments.set(attachment.id, new MessageAttachment(
-          attachment.url, attachment.filename, attachment
+          attachment.url, attachment.filename, attachment,
         ));
       }
     } else {
@@ -242,7 +242,7 @@ class Message extends Base {
       'mentions' in data ? data.mentions : this.mentions.users,
       'mentions_roles' in data ? data.mentions_roles : this.mentions.roles,
       'mention_everyone' in data ? data.mention_everyone : this.mentions.everyone,
-      'mention_channels' in data ? data.mention_channels : this.mentions.crosspostedChannels
+      'mention_channels' in data ? data.mention_channels : this.mentions.crosspostedChannels,
     );
 
     this.flags = new MessageFlags('flags' in data ? data.flags : 0).freeze();
@@ -511,7 +511,7 @@ class Message extends Base {
   reply(content, options) {
     return this.channel.send(content instanceof APIMessage ?
       content :
-      APIMessage.transformOptions(content, options, { reply: this.member || this.author })
+      APIMessage.transformOptions(content, options, { reply: this.member || this.author }),
     );
   }
 
diff --git a/src/structures/interfaces/TextBasedChannel.js b/src/structures/interfaces/TextBasedChannel.js
index 4106e00df..0fe0e2dca 100644
--- a/src/structures/interfaces/TextBasedChannel.js
+++ b/src/structures/interfaces/TextBasedChannel.js
@@ -300,7 +300,7 @@ class TextBasedChannel {
       let messageIDs = messages instanceof Collection ? messages.keyArray() : messages.map(m => m.id || m);
       if (filterOld) {
         messageIDs = messageIDs.filter(id =>
-          Date.now() - Snowflake.deconstruct(id).date.getTime() < 1209600000
+          Date.now() - Snowflake.deconstruct(id).date.getTime() < 1209600000,
         );
       }
       if (messageIDs.length === 0) return new Collection();
@@ -336,7 +336,7 @@ class TextBasedChannel {
         'typing',
         'typingCount',
         'createMessageCollector',
-        'awaitMessages'
+        'awaitMessages',
       );
     }
     for (const prop of props) {
diff --git a/src/util/Snowflake.js b/src/util/Snowflake.js
index 06612c30b..71090adc0 100644
--- a/src/util/Snowflake.js
+++ b/src/util/Snowflake.js
@@ -36,7 +36,7 @@ class SnowflakeUtil {
     if (timestamp instanceof Date) timestamp = timestamp.getTime();
     if (typeof timestamp !== 'number' || isNaN(timestamp)) {
       throw new TypeError(
-        `"timestamp" argument must be a number (received ${isNaN(timestamp) ? 'NaN' : typeof timestamp})`
+        `"timestamp" argument must be a number (received ${isNaN(timestamp) ? 'NaN' : typeof timestamp})`,
       );
     }
     if (INCREMENT >= 4095) INCREMENT = 0;
diff --git a/src/util/Structures.js b/src/util/Structures.js
index c4061f62c..fdbab0697 100644
--- a/src/util/Structures.js
+++ b/src/util/Structures.js
@@ -45,7 +45,7 @@ class Structures {
     if (typeof extender !== 'function') {
       const received = `(received ${typeof extender})`;
       throw new TypeError(
-        `"extender" argument must be a function that returns the extended structure class/prototype ${received}.`
+        `"extender" argument must be a function that returns the extended structure class/prototype ${received}.`,
       );
     }
 
@@ -60,7 +60,7 @@ class Structures {
       const received = `${extended.name || 'unnamed'}${prototype.name ? ` extends ${prototype.name}` : ''}`;
       throw new Error(
         'The class/prototype returned from the extender function must extend the existing structure class/prototype' +
-        ` (received function ${received}; expected extension of ${structures[structure].name}).`
+        ` (received function ${received}; expected extension of ${structures[structure].name}).`,
       );
     }
 
diff --git a/src/util/Util.js b/src/util/Util.js
index 4ab518773..6e878f34e 100644
--- a/src/util/Util.js
+++ b/src/util/Util.js
@@ -437,7 +437,7 @@ class Util {
     return collection.sorted((a, b) =>
       a.rawPosition - b.rawPosition ||
       parseInt(b.id.slice(0, -10)) - parseInt(a.id.slice(0, -10)) ||
-      parseInt(b.id.slice(10)) - parseInt(a.id.slice(10))
+      parseInt(b.id.slice(10)) - parseInt(a.id.slice(10)),
     );
   }