diff --git a/src/modules/article/article.controller.ts b/src/modules/article/article.controller.ts
index 8b5a218..47b72e5 100644
--- a/src/modules/article/article.controller.ts
+++ b/src/modules/article/article.controller.ts
@@ -1,7 +1,6 @@
 import { Controller } from "@/common/controller";
 import { createOrmContextMiddleware } from "@/common/middlewares/create-orm-context.middleware";
 import { isAdminMiddleware } from "@/common/middlewares/is-admin.middleware";
-import { paginationQuerySchema } from "@/common/schemas";
 import type { AbstractFileStorage } from "@/common/services/file-storage/abstract.file-storage";
 import type { AbstractJwtService } from "@/common/services/jwt-service/abstract.jwt-service";
 import type {
@@ -16,9 +15,11 @@ import { orm } from "@/database/orm";
 import type { ArticleMapper } from "@/modules/article/article.mapper";
 import {
 	articleParamsSchema,
+	articleQuerySchema,
 	articleRequestSchema,
 } from "@/modules/article/article.schemas";
 import type { ArticleResponse } from "@/modules/article/article.types";
+import type { FilterQuery } from "@mikro-orm/core";
 import { Router, type Request, type Response } from "express";
 import slugify from "slugify";
 import { ulid } from "ulid";
@@ -83,7 +84,7 @@ export class ArticleController extends Controller {
 	}
 
 	async list(req: Request, res: Response) {
-		const parseQueryResult = paginationQuerySchema.safeParse(req.query);
+		const parseQueryResult = articleQuerySchema.safeParse(req.query);
 		if (!parseQueryResult.success) {
 			return this.handleZodError(parseQueryResult.error, res, "query");
 		}
@@ -91,15 +92,16 @@ export class ArticleController extends Controller {
 
 		const count = await orm.em.count(Article);
 
-		const articles = await orm.em.find(
-			Article,
-			{},
-			{
-				limit: query.per_page,
-				offset: (query.page - 1) * query.per_page,
-				orderBy: { createdAt: "DESC" },
-			},
-		);
+		const filter: FilterQuery<Article> = {};
+		if (query.tag_slug) {
+			filter.tags = { slug: query.tag_slug };
+		}
+
+		const articles = await orm.em.find(Article, filter, {
+			limit: query.per_page,
+			offset: (query.page - 1) * query.per_page,
+			orderBy: { createdAt: "DESC" },
+		});
 
 		return res.status(200).json({
 			data: articles.map(this.mapper.mapEntityToResponse.bind(this.mapper)),
diff --git a/src/modules/article/article.schemas.ts b/src/modules/article/article.schemas.ts
index abb8f55..31e9cea 100644
--- a/src/modules/article/article.schemas.ts
+++ b/src/modules/article/article.schemas.ts
@@ -1,3 +1,4 @@
+import { paginationQuerySchema } from "@/common/schemas";
 import z from "zod";
 
 export const articleRequestSchema = z.object({
@@ -21,6 +22,17 @@ export const articleRequestSchema = z.object({
 		.max(100, "Max 100 characters."),
 });
 
+export const articleQuerySchema = z.intersection(
+	paginationQuerySchema,
+	z.object({
+		tag_slug: z
+			.string("Must be string.")
+			.nonempty("Must not empty.")
+			.max(100, "Max 100 characters.")
+			.optional(),
+	}),
+);
+
 export const articleParamsSchema = z.object({
 	slug: z
 		.string("Must be string.")
diff --git a/src/modules/article/article.types.ts b/src/modules/article/article.types.ts
index e7b36f5..dda8a2e 100644
--- a/src/modules/article/article.types.ts
+++ b/src/modules/article/article.types.ts
@@ -1,5 +1,6 @@
 import type {
 	articleParamsSchema,
+	articleQuerySchema,
 	articleRequestSchema,
 } from "@/modules/article/article.schemas";
 import type { TagResponse } from "@/modules/tag/tag.types";
@@ -7,6 +8,8 @@ import z from "zod";
 
 export type ArticleRequest = z.infer<typeof articleRequestSchema>;
 
+export type ArticleQuery = z.infer<typeof articleQuerySchema>;
+
 export type ArticleParams = z.infer<typeof articleParamsSchema>;
 
 export type ArticleResponse = {
diff --git a/src/modules/tag/tag.controller.ts b/src/modules/tag/tag.controller.ts
index 16a0092..9c56cdf 100644
--- a/src/modules/tag/tag.controller.ts
+++ b/src/modules/tag/tag.controller.ts
@@ -87,13 +87,13 @@ export class TagController extends Controller {
 		}
 		const params = parseParamsResult.data;
 
-		const tag = await orm.em.findOne(Tag, { id: params.id });
+		const tag = await orm.em.findOne(Tag, { slug: params.slug });
 		if (!tag) {
 			return res.status(404).json({
 				data: null,
 				errors: [
 					{
-						path: "id",
+						path: "slug",
 						location: "params",
 						message: "Tag not found.",
 					},
@@ -120,13 +120,13 @@ export class TagController extends Controller {
 		}
 		const body = parseBodyResult.data;
 
-		const tag = await orm.em.findOne(Tag, { id: params.id });
+		const tag = await orm.em.findOne(Tag, { slug: params.slug });
 		if (!tag) {
 			return res.status(404).json({
 				data: null,
 				errors: [
 					{
-						path: "id",
+						path: "slug",
 						location: "params",
 						message: "Tag not found.",
 					},
@@ -155,7 +155,7 @@ export class TagController extends Controller {
 
 		const tag = await orm.em.findOne(
 			Tag,
-			{ id: params.id },
+			{ slug: params.slug },
 			{
 				populate: ["*"],
 			},
@@ -165,7 +165,7 @@ export class TagController extends Controller {
 				data: null,
 				errors: [
 					{
-						path: "id",
+						path: "slug",
 						location: "params",
 						message: "Tag not found.",
 					},
diff --git a/src/modules/tag/tag.schemas.ts b/src/modules/tag/tag.schemas.ts
index 1090d5c..30de4e2 100644
--- a/src/modules/tag/tag.schemas.ts
+++ b/src/modules/tag/tag.schemas.ts
@@ -8,8 +8,8 @@ export const tagRequestSchema = z.object({
 });
 
 export const tagParamsSchema = z.object({
-	id: z
-		.ulid("Must be ulid string.")
+	slug: z
+		.string("Must be string.")
 		.nonempty("Must not empty.")
-		.max(30, "Max 30 characters."),
+		.max(100, "Max 100 characters."),
 });