diff --git a/frontend/src/Auth/Login.tsx b/frontend/src/Auth/Login.tsx
index 240f5cc..df22373 100644
--- a/frontend/src/Auth/Login.tsx
+++ b/frontend/src/Auth/Login.tsx
@@ -2,26 +2,96 @@ import "./Auth.scss";
 
 import { Button, Card, FormGroup, H2, InputGroup } from "@blueprintjs/core";
 import * as React from "react";
+import { connect } from "react-redux";
+import { Dispatch } from "redux";
+import { authStart } from "~redux/auth/actions";
+import { IAppState } from "~redux/reducers";
 
-export function Login() {
-    return (
-        <>
-            <Card className="AuthForm" elevation={2}>
-                <form>
-                    <H2>Login</H2>
-                    <FormGroup label="Username">
-                        <InputGroup leftIcon="person" />
-                    </FormGroup>
-                    <FormGroup label="Password">
-                        <InputGroup leftIcon="key" />
-                    </FormGroup>
-                    <div className="buttons">
-                        <Button className="submit" intent="primary">
-                            Login
-                        </Button>
-                    </div>
-                </form>
-            </Card>
-        </>
-    );
+interface ILoginComponentProps {
+    inProgress: boolean;
+    error: string;
+    login: (username: string, password: string) => void;
 }
+
+interface ILoginComponentState {
+    username: string;
+    password: string;
+}
+
+export class LoginComponent extends React.PureComponent<
+    ILoginComponentProps,
+    ILoginComponentState
+> {
+    constructor(props: ILoginComponentProps) {
+        super(props);
+        this.submit = this.submit.bind(this);
+        this.updateFields = this.updateFields.bind(this);
+        this.state = { username: "", password: "" };
+    }
+
+    public submit() {
+        const { username, password } = this.state;
+        this.props.login(username, password);
+    }
+
+    public updateFields(e: React.FormEvent<HTMLInputElement>) {
+        const { value, name } = e.currentTarget;
+        this.setState({ ...this.state, [name]: value });
+    }
+
+    public render() {
+        return (
+            <>
+                <Card className="AuthForm" elevation={2}>
+                    <form>
+                        <H2>Login</H2>
+                        <FormGroup label="Username">
+                            <InputGroup
+                                name="username"
+                                value={this.state.username}
+                                onChange={this.updateFields}
+                                leftIcon="person"
+                            />
+                        </FormGroup>
+                        <FormGroup label="Password">
+                            <InputGroup
+                                name="password"
+                                value={this.state.password}
+                                onChange={this.updateFields}
+                                type="password"
+                                leftIcon="key"
+                            />
+                        </FormGroup>
+                        <div className="buttons">
+                            <div id="errors">{this.props.error}</div>
+                            <Button
+                                className="submit"
+                                intent="primary"
+                                onClick={this.submit}
+                                active={!this.props.inProgress}
+                            >
+                                Login
+                            </Button>
+                        </div>
+                    </form>
+                </Card>
+            </>
+        );
+    }
+}
+
+function mapStateToProps(state: IAppState) {
+    return { inProgress: state.auth.inProgress, error: state.auth.error };
+}
+
+function mapDispatchToProps(dispatch: Dispatch) {
+    return {
+        login: (username: string, password: string) =>
+            dispatch(authStart(username, password)),
+    };
+}
+
+export const Login = connect(
+    mapStateToProps,
+    mapDispatchToProps,
+)(LoginComponent);
diff --git a/frontend/src/redux/api/auth/index.ts b/frontend/src/redux/api/auth/index.ts
new file mode 100644
index 0000000..97e2b3b
--- /dev/null
+++ b/frontend/src/redux/api/auth/index.ts
@@ -0,0 +1,8 @@
+import { fetchJSON } from "../utils";
+
+export async function login(username: string, password: string) {
+    return fetchJSON("/users/login", "POST", {
+        username,
+        password,
+    });
+}
diff --git a/frontend/src/redux/api/utils.ts b/frontend/src/redux/api/utils.ts
new file mode 100644
index 0000000..546551c
--- /dev/null
+++ b/frontend/src/redux/api/utils.ts
@@ -0,0 +1,50 @@
+let token: string | null;
+
+export function setToken(_token: string) {
+    token = _token;
+}
+
+export function getToken() {
+    return token;
+}
+
+export function deleteToken(_token: string) {
+    token = null;
+}
+
+const root = "http://localhost:3000";
+
+export async function fetchJSON(
+    path: string,
+    method: string,
+    body: string | object,
+    headers?: Record<string, string>,
+) {
+    if (typeof body === "object") {
+        body = JSON.stringify(body);
+    }
+    const response = await fetch(root + path, {
+        method,
+        body,
+        headers: {
+            ...headers,
+            "Content-Type": "application/json",
+        },
+    });
+    const json = await response.json();
+    return json;
+}
+
+export async function fetchJSONAuth(
+    path: string,
+    method: string,
+    body: string | object,
+    headers?: object,
+) {
+    if (token) {
+        return fetchJSON(path, method, body, {
+            ...headers,
+            Authorization: `Bearer ${token}`,
+        });
+    }
+}
diff --git a/frontend/src/redux/auth/actions.ts b/frontend/src/redux/auth/actions.ts
index e5ab2b8..aeb31fd 100644
--- a/frontend/src/redux/auth/actions.ts
+++ b/frontend/src/redux/auth/actions.ts
@@ -1,10 +1,49 @@
 import { Action } from "redux";
 
-export const AUTH_SUCCESS = "AUTH_SUCCESS";
-
-class AuthSuccessAction implements Action {
-    public readonly type = AUTH_SUCCESS;
-    constructor(public jwt: string) {}
+export enum AuthTypes {
+    AUTH_START = "AUTH_START",
+    AUTH_SUCCESS = "AUTH_SUCCESS",
+    AUTH_FAIL = "AUTH_FAIL",
 }
 
-export type AuthAction = AuthSuccessAction;
+export interface IAuthStartActionAction extends Action {
+    type: AuthTypes.AUTH_START;
+    payload: {
+        username: string;
+        password: string;
+    };
+}
+
+export interface IAuthSuccessActionAction extends Action {
+    type: AuthTypes.AUTH_SUCCESS;
+    payload: {
+        jwt: string;
+    };
+}
+
+export interface IAuthFailureActionAction extends Action {
+    type: AuthTypes.AUTH_FAIL;
+    payload: {
+        error: string;
+    };
+}
+
+export function authStart(
+    username: string,
+    password: string,
+): IAuthStartActionAction {
+    return { type: AuthTypes.AUTH_START, payload: { username, password } };
+}
+
+export function authSuccess(jwt: string): IAuthSuccessActionAction {
+    return { type: AuthTypes.AUTH_SUCCESS, payload: { jwt } };
+}
+
+export function authFail(error: string): IAuthFailureActionAction {
+    return { type: AuthTypes.AUTH_FAIL, payload: { error } };
+}
+
+export type AuthAction =
+    | IAuthStartActionAction
+    | IAuthSuccessActionAction
+    | IAuthFailureActionAction;
diff --git a/frontend/src/redux/auth/reducer.ts b/frontend/src/redux/auth/reducer.ts
index 868085d..452f7e9 100644
--- a/frontend/src/redux/auth/reducer.ts
+++ b/frontend/src/redux/auth/reducer.ts
@@ -1,15 +1,17 @@
 import { Reducer } from "react";
 
-import { AUTH_SUCCESS, AuthAction } from "./actions";
+import { AuthAction, AuthTypes } from "./actions";
 
 export interface IAuthState {
     jwt: string | null;
     inProgress: boolean;
+    error: string | null;
 }
 
 const defaultAuthState: IAuthState = {
     jwt: null,
     inProgress: false,
+    error: null,
 };
 
 export const auth: Reducer<IAuthState, AuthAction> = (
@@ -17,8 +19,14 @@ export const auth: Reducer<IAuthState, AuthAction> = (
     action: AuthAction,
 ) => {
     switch (action.type) {
-        case AUTH_SUCCESS:
-            return { ...state, jwt: action.jwt, inProgress: false };
+        case AuthTypes.AUTH_START:
+            return { ...state, inProgress: true };
+            break;
+        case AuthTypes.AUTH_SUCCESS:
+            return { ...state, jwt: action.payload.jwt, inProgress: false };
+            break;
+        case AuthTypes.AUTH_FAIL:
+            return { ...defaultAuthState, error: action.payload.error };
             break;
         default:
             return state;
diff --git a/frontend/src/redux/auth/sagas.ts b/frontend/src/redux/auth/sagas.ts
new file mode 100644
index 0000000..16a3899
--- /dev/null
+++ b/frontend/src/redux/auth/sagas.ts
@@ -0,0 +1,38 @@
+import { delay } from "redux-saga";
+import { call, put, race, takeLatest } from "redux-saga/effects";
+import { login } from "~redux/api/auth";
+import { setToken } from "~redux/api/utils";
+
+import {
+    authFail,
+    authSuccess,
+    AuthTypes,
+    IAuthStartActionAction,
+} from "./actions";
+
+function* authStart(action: IAuthStartActionAction) {
+    const { username, password } = action.payload;
+    try {
+        const { response, timeout } = yield race({
+            response: call(login, username, password),
+            timeout: call(delay, 1000),
+        });
+
+        if (timeout) {
+            return put(authFail("Timeout"));
+        }
+        if (response.data) {
+            const user = response.data;
+            yield call(setToken, user.jwt);
+            yield put(authSuccess(user.jwt));
+        } else {
+            yield put(authFail(response.error));
+        }
+    } catch (e) {
+        yield put(authFail(e.toString()));
+    }
+}
+
+export function* authSaga() {
+    yield takeLatest(AuthTypes.AUTH_START, authStart);
+}
diff --git a/frontend/src/redux/reducers.ts b/frontend/src/redux/reducers.ts
index 7ec4c33..4f7d9fb 100644
--- a/frontend/src/redux/reducers.ts
+++ b/frontend/src/redux/reducers.ts
@@ -1,4 +1,8 @@
 import { combineReducers } from "redux";
-import { auth } from "~redux/auth/reducer";
+import { auth, IAuthState } from "~redux/auth/reducer";
+
+export interface IAppState {
+    auth: IAuthState;
+}
 
 export const rootReducer = combineReducers({ auth });
diff --git a/frontend/src/redux/store.ts b/frontend/src/redux/store.ts
index 9008c1d..2117006 100644
--- a/frontend/src/redux/store.ts
+++ b/frontend/src/redux/store.ts
@@ -1,4 +1,11 @@
-import { createStore } from "redux";
+import { applyMiddleware, createStore } from "redux";
+import createSagaMiddlware from "redux-saga";
 import { rootReducer } from "~redux/reducers";
 
-export const store = createStore(rootReducer);
+import { authSaga } from "./auth/sagas";
+
+const sagaMiddleware = createSagaMiddlware();
+
+export const store = createStore(rootReducer, applyMiddleware(sagaMiddleware));
+
+sagaMiddleware.run(authSaga);
diff --git a/frontend/tsconfig.json b/frontend/tsconfig.json
index 5167cd6..bcb05dd 100644
--- a/frontend/tsconfig.json
+++ b/frontend/tsconfig.json
@@ -5,7 +5,7 @@
             "dom"
         ],
         "jsx": "react",
-        "target": "es6",
+        "target": "es5",
         "module": "commonjs",
         "moduleResolution": "node",
         "outDir": "./dist",
diff --git a/package-lock.json b/package-lock.json
index da0d178..1b337e3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -68,6 +68,14 @@
             }
          }
       },
+      "@koa/cors": {
+         "version": "2.2.3",
+         "resolved": "https://registry.npmjs.org/@koa/cors/-/cors-2.2.3.tgz",
+         "integrity": "sha512-tCVVXa39ETsit5kGBtEWWimjLn1sDaeu8+0phgb8kT3GmBDZOykkI3ZO8nMjV2p3MGkJI4K5P+bxR8Ztq0bwsA==",
+         "requires": {
+            "vary": "^1.1.2"
+         }
+      },
       "@types/accepts": {
          "version": "1.3.5",
          "resolved": "http://registry.npmjs.org/@types/accepts/-/accepts-1.3.5.tgz",
@@ -151,8 +159,7 @@
       "@types/events": {
          "version": "1.2.0",
          "resolved": "http://registry.npmjs.org/@types/events/-/events-1.2.0.tgz",
-         "integrity": "sha512-KEIlhXnIutzKwRbQkGWb/I4HFqBuUykAdHgDED6xqwXJfONCjF5VoE0cXEiurh3XauygxzeDzgtXUqvLkxFzzA==",
-         "dev": true
+         "integrity": "sha512-KEIlhXnIutzKwRbQkGWb/I4HFqBuUykAdHgDED6xqwXJfONCjF5VoE0cXEiurh3XauygxzeDzgtXUqvLkxFzzA=="
       },
       "@types/express": {
          "version": "4.16.0",
@@ -176,6 +183,15 @@
             "@types/range-parser": "*"
          }
       },
+      "@types/formidable": {
+         "version": "1.0.31",
+         "resolved": "https://registry.npmjs.org/@types/formidable/-/formidable-1.0.31.tgz",
+         "integrity": "sha512-dIhM5t8lRP0oWe2HF8MuPvdd1TpPTjhDMAqemcq6oIZQCBQTovhBAdTQ5L5veJB4pdQChadmHuxtB0YzqvfU3Q==",
+         "requires": {
+            "@types/events": "*",
+            "@types/node": "*"
+         }
+      },
       "@types/http-assert": {
          "version": "1.4.0",
          "resolved": "https://registry.npmjs.org/@types/http-assert/-/http-assert-1.4.0.tgz",
@@ -223,15 +239,6 @@
             "@types/node": "*"
          }
       },
-      "@types/koa-bodyparser": {
-         "version": "4.2.1",
-         "resolved": "https://registry.npmjs.org/@types/koa-bodyparser/-/koa-bodyparser-4.2.1.tgz",
-         "integrity": "sha512-dd6mVT30OmGYIOmNRF3269Bv+IJ68AVrvYcPViB7bYnzxk7nZyfeAsUx96lvXmaTpOGF4XZ7WDCuSOd7Npi6pw==",
-         "dev": true,
-         "requires": {
-            "@types/koa": "*"
-         }
-      },
       "@types/koa-compose": {
          "version": "3.2.2",
          "resolved": "https://registry.npmjs.org/@types/koa-compose/-/koa-compose-3.2.2.tgz",
@@ -256,6 +263,15 @@
             "@types/koa": "*"
          }
       },
+      "@types/koa__cors": {
+         "version": "2.2.3",
+         "resolved": "https://registry.npmjs.org/@types/koa__cors/-/koa__cors-2.2.3.tgz",
+         "integrity": "sha512-RfG2EuSc+nv/E+xbDSLW8KCoeri/3AkqwVPuENfF/DctllRoXhooboO//Sw7yFtkLvj7nG7O1H3JcZmoTQz8nQ==",
+         "dev": true,
+         "requires": {
+            "@types/koa": "*"
+         }
+      },
       "@types/lodash": {
          "version": "4.14.119",
          "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.14.119.tgz",
@@ -1230,14 +1246,14 @@
          "integrity": "sha1-bqa989hTrlTMuOR7+gvz+QMfsYQ="
       },
       "co-body": {
-         "version": "6.0.0",
-         "resolved": "https://registry.npmjs.org/co-body/-/co-body-6.0.0.tgz",
-         "integrity": "sha512-9ZIcixguuuKIptnY8yemEOuhb71L/lLf+Rl5JfJEUiDNJk0e02MBt7BPxR2GEh5mw8dPthQYR4jPI/BnS1MQgw==",
+         "version": "5.2.0",
+         "resolved": "https://registry.npmjs.org/co-body/-/co-body-5.2.0.tgz",
+         "integrity": "sha512-sX/LQ7LqUhgyaxzbe7IqwPeTr2yfpfUIQ/dgpKo6ZI4y4lpQA0YxAomWIY+7I7rHWcG02PG+OuPREzMW/5tszQ==",
          "requires": {
             "inflation": "^2.0.0",
-            "qs": "^6.5.2",
-            "raw-body": "^2.3.3",
-            "type-is": "^1.6.16"
+            "qs": "^6.4.0",
+            "raw-body": "^2.2.0",
+            "type-is": "^1.6.14"
          }
       },
       "code-point-at": {
@@ -1544,11 +1560,6 @@
             "keygrip": "~1.0.3"
          }
       },
-      "copy-to": {
-         "version": "2.0.1",
-         "resolved": "https://registry.npmjs.org/copy-to/-/copy-to-2.0.1.tgz",
-         "integrity": "sha1-JoD7uAaKSNCGVrYJgJK9r8kG9KU="
-      },
       "core-util-is": {
          "version": "1.0.2",
          "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
@@ -2313,8 +2324,7 @@
       "formidable": {
          "version": "1.2.1",
          "resolved": "https://registry.npmjs.org/formidable/-/formidable-1.2.1.tgz",
-         "integrity": "sha512-Fs9VRguL0gqGHkXS5GQiMCr1VhZBxz0JnJs4JmMp/2jL18Fmbzvv7vOFRU+U8TBkHEE/CX1qDXzJplVULgsLeg==",
-         "dev": true
+         "integrity": "sha512-Fs9VRguL0gqGHkXS5GQiMCr1VhZBxz0JnJs4JmMp/2jL18Fmbzvv7vOFRU+U8TBkHEE/CX1qDXzJplVULgsLeg=="
       },
       "fresh": {
          "version": "0.5.2",
@@ -2811,13 +2821,14 @@
             }
          }
       },
-      "koa-bodyparser": {
-         "version": "4.2.1",
-         "resolved": "https://registry.npmjs.org/koa-bodyparser/-/koa-bodyparser-4.2.1.tgz",
-         "integrity": "sha512-UIjPAlMZfNYDDe+4zBaOAUKYqkwAGcIU6r2ARf1UOXPAlfennQys5IiShaVeNf7KkVBlf88f2LeLvBFvKylttw==",
+      "koa-body": {
+         "version": "4.0.6",
+         "resolved": "https://registry.npmjs.org/koa-body/-/koa-body-4.0.6.tgz",
+         "integrity": "sha512-k03au8eI5FL48fA1YqnpDT9lcRaarHDEGUOes/ppaEbG6vhbU1xvegxP9QHvJz+UgQq75Vw8z3busd484I/PAA==",
          "requires": {
-            "co-body": "^6.0.0",
-            "copy-to": "^2.0.1"
+            "@types/formidable": "^1.0.31",
+            "co-body": "^5.1.1",
+            "formidable": "^1.1.1"
          }
       },
       "koa-compose": {
diff --git a/package.json b/package.json
index 2dce531..64b3471 100644
--- a/package.json
+++ b/package.json
@@ -8,9 +8,9 @@
         "@types/eslint-plugin-prettier": "^2.2.0",
         "@types/jsonwebtoken": "^8.3.0",
         "@types/koa": "^2.0.48",
-        "@types/koa-bodyparser": "^4.2.1",
         "@types/koa-logger": "^3.1.1",
         "@types/koa-router": "^7.0.35",
+        "@types/koa__cors": "^2.2.3",
         "@types/lodash": "^4.14.119",
         "@types/mocha": "^5.2.5",
         "@types/mysql": "^2.15.5",
@@ -40,10 +40,11 @@
         "typescript": "3.2.2"
     },
     "dependencies": {
+        "@koa/cors": "^2.2.3",
         "bcrypt": "^3.0.3",
         "jsonwebtoken": "^8.4.0",
         "koa": "^2.6.2",
-        "koa-bodyparser": "^4.2.1",
+        "koa-body": "^4.0.6",
         "koa-jwt": "^3.5.1",
         "koa-logger": "^3.2.0",
         "koa-router": "^7.4.0",
diff --git a/src/app.ts b/src/app.ts
index 4a8aae0..8ea7086 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,7 +1,8 @@
 import "reflect-metadata";
 
+import * as cors from "@koa/cors";
 import * as Koa from "koa";
-import * as bodyParser from "koa-bodyparser";
+import * as bodyParser from "koa-body";
 import * as jwt from "koa-jwt";
 import * as logger from "koa-logger";
 import { config } from "~config";
@@ -9,6 +10,7 @@ import { userRouter } from "~routes/users";
 
 export const app = new Koa();
 
+app.use(cors());
 app.use(logger());
 app.use(bodyParser());
 app.use(
diff --git a/src/routes/users.ts b/src/routes/users.ts
index 0ddf73a..1cd25d8 100644
--- a/src/routes/users.ts
+++ b/src/routes/users.ts
@@ -15,14 +15,17 @@ userRouter.get("/users/user", async ctx => {
     ctx.body = { errors: false, data: user.toAuthJSON() };
 });
 
-userRouter.get("/users/login", async ctx => {
-    if (!ctx.request.body) {
+userRouter.post("/users/login", async ctx => {
+    const request = ctx.request as any;
+
+    if (!request.body) {
         ctx.throw(400);
     }
-    const { username, password } = ctx.request.body as {
+    const { username, password } = request.body as {
         username: string | null;
         password: string | null;
     };
+
     if (!(username && password)) {
         ctx.throw(400);
     }
@@ -35,12 +38,14 @@ userRouter.get("/users/login", async ctx => {
     ctx.body = { errors: false, data: user.toAuthJSON() };
 });
 
-userRouter.get("/users/signup", async ctx => {
-    if (!ctx.request.body) {
+userRouter.post("/users/signup", async ctx => {
+    const request = ctx.request as any;
+
+    if (!request.body) {
         ctx.throw(400);
     }
 
-    const { username, password } = ctx.request.body as {
+    const { username, password } = request.body as {
         username: string | null;
         password: string | null;
     };
diff --git a/tests/integration/users.test.ts b/tests/integration/users.test.ts
index 8b767f7..6bc1ce2 100644
--- a/tests/integration/users.test.ts
+++ b/tests/integration/users.test.ts
@@ -27,7 +27,10 @@ describe("users", () => {
     it("should get user", async () => {
         const response = await request(callback)
             .get("/users/user")
-            .set({ Authorization: `Bearer ${seed.user1.toJWT()}` })
+            .set({
+                Authorization: `Bearer ${seed.user1.toJWT()}`,
+                "Content-Type": "application/json",
+            })
             .expect("Content-Type", /json/)
             .expect(200);
 
@@ -40,7 +43,8 @@ describe("users", () => {
 
     it("should login user", async () => {
         const response = await request(callback)
-            .get("/users/login")
+            .post("/users/login")
+            .set({ "Content-Type": "application/json" })
             .send({ username: "User1", password: "User1" })
             .expect("Content-Type", /json/)
             .expect(200);
@@ -54,7 +58,8 @@ describe("users", () => {
 
     it("should not login user with wrong password", async () => {
         const response = await request(callback)
-            .get("/users/login")
+            .post("/users/login")
+            .set({ "Content-Type": "application/json" })
             .send({ username: "User1", password: "asdf" })
             .expect(404);
 
@@ -63,7 +68,8 @@ describe("users", () => {
 
     it("should signup user", async () => {
         const response = await request(callback)
-            .get("/users/signup")
+            .post("/users/signup")
+            .set({ "Content-Type": "application/json" })
             .send({ username: "NUser1", password: "NUser1" })
             .expect("Content-Type", /json/)
             .expect(200);
@@ -79,7 +85,8 @@ describe("users", () => {
 
     it("should not signup user with duplicate username", async () => {
         const response = await request(callback)
-            .get("/users/signup")
+            .post("/users/signup")
+            .set({ "Content-Type": "application/json" })
             .send({ username: "User1", password: "NUser1" })
             .expect(400);
 
diff --git a/tslint.json b/tslint.json
index c4a23ce..3d1f1a0 100644
--- a/tslint.json
+++ b/tslint.json
@@ -10,6 +10,7 @@
         "object-literal-sort-keys": false,
         "no-implicit-dependencies": false,
         "no-submodule-imports": false,
-        "no-this-assignment": false
+        "no-this-assignment": false,
+        "max-classes-per-file": false
     }
 }
\ No newline at end of file