diff --git a/migrations/20180707152000_create_mutes_table.js b/migrations/20180707152000_create_mutes_table.js
new file mode 100644
index 00000000..59da8db6
--- /dev/null
+++ b/migrations/20180707152000_create_mutes_table.js
@@ -0,0 +1,17 @@
+exports.up = async function(knex) {
+  if (! await knex.schema.hasTable('mutes')) {
+    await knex.schema.createTable('mutes', table => {
+      table.bigInteger('guild_id').unsigned().notNullable();
+      table.bigInteger('user_id').unsigned().notNullable();
+      table.dateTime('created_at');
+      table.dateTime('expires_at');
+
+      table.primary(['guild_id', 'user_id']);
+      table.index(['expires_at']);
+    });
+  }
+};
+
+exports.down = async function(knex) {
+  await knex.schema.dropTableIfExists('mutes');
+};
diff --git a/src/data/GuildMutes.ts b/src/data/GuildMutes.ts
new file mode 100644
index 00000000..ebcb3570
--- /dev/null
+++ b/src/data/GuildMutes.ts
@@ -0,0 +1,78 @@
+import knex from "../knex";
+import moment from "moment-timezone";
+import Mute from "../models/Mute";
+
+export class GuildMutes {
+  protected guildId: string;
+
+  constructor(guildId) {
+    this.guildId = guildId;
+  }
+
+  async getExpiredMutes(): Promise<Mute[]> {
+    const result = await knex("mutes")
+      .where("guild_id", this.guildId)
+      .where("expires_at", "<=", "CURDATE()")
+      .whereNotNull("expires_at")
+      .select();
+
+    return result.map(r => new Mute(r));
+  }
+
+  async findExistingMuteForUserId(userId: string): Promise<Mute[]> {
+    const result = await knex("mutes")
+      .where("guild_id", this.guildId)
+      .where("user_id", userId)
+      .first();
+
+    return result.map(r => new Mute(r));
+  }
+
+  async addMute(userId, expiryTime) {
+    const expiresAt = expiryTime
+      ? moment()
+          .add(expiryTime, "ms")
+          .format("YYYY-MM-DD HH:mm:ss")
+      : null;
+
+    return knex
+      .insert({
+        guild_id: this.guildId,
+        user_id: userId,
+        expires_at: expiresAt
+      })
+      .into("mutes");
+  }
+
+  async updateExpiryTime(userId, newExpiryTime) {
+    const expiresAt = newExpiryTime
+      ? moment()
+          .add(newExpiryTime, "ms")
+          .format("YYYY-MM-DD HH:mm:ss")
+      : null;
+
+    return knex("mutes")
+      .where("guild_id", this.guildId)
+      .where("user_id", userId)
+      .update({
+        expires_at: expiresAt
+      });
+  }
+
+  async addOrUpdateMute(userId, expiryTime) {
+    const existingMute = await this.findExistingMuteForUserId(userId);
+
+    if (existingMute) {
+      return this.updateExpiryTime(userId, expiryTime);
+    } else {
+      return this.addMute(userId, expiryTime);
+    }
+  }
+
+  async unmute(userId) {
+    return knex
+      .where("guild_id", this.guildId)
+      .where("user_id", userId)
+      .delete();
+  }
+}
diff --git a/src/models/Mute.ts b/src/models/Mute.ts
new file mode 100644
index 00000000..385bf6f9
--- /dev/null
+++ b/src/models/Mute.ts
@@ -0,0 +1,8 @@
+import Model from "./Model";
+
+export default class Mute extends Model {
+  public guild_id: string;
+  public user_id: string;
+  public created_at: string;
+  public expires_at: string;
+}