diff --git a/src/models/guildModel.ts b/src/models/guildModel.ts
index f0f47e91..9815d257 100644
--- a/src/models/guildModel.ts
+++ b/src/models/guildModel.ts
@@ -122,4 +122,6 @@ const guildMemberSchema = new Schema<IGuildMemberDatabase>({
     rank: { type: Number, default: 7 }
 });
 
+guildMemberSchema.index({ accountId: 1, guildId: 1 }, { unique: true });
+
 export const GuildMember = model<IGuildMemberDatabase>("GuildMember", guildMemberSchema);