diff --git a/frontend/src/components/app.tsx b/frontend/src/components/app.tsx
index 43242db..b4b6e84 100644
--- a/frontend/src/components/app.tsx
+++ b/frontend/src/components/app.tsx
@@ -22,6 +22,7 @@ import { ILearner } from "../models/learner";
 import { IVocab, VocabType } from "../models/vocab";
 import { IReviewMetadata, ReviewType } from "../models/review";
 import { IUser } from "../models/user";
+import { IResponse } from "../models/server";
 
 interface IProps {
     authenticated: boolean;
@@ -195,7 +196,7 @@ export default class Application extends React.Component<IProps> {
         });
     }
 
-    login = (username: string, password: string): Promise<IUser | {}> => {
+    login = (username: string, password: string): Promise<IUser | IResponse> => {
         return new Promise((res, rej) => {
             fetch(`${BACKEND_URL}/login`, {
                 method: "POST",
@@ -209,15 +210,16 @@ export default class Application extends React.Component<IProps> {
                     password,
                 }),
             }).then(data => data.json())
-                .then(resp => {
+                .then((resp: IResponse) => {
                     if (resp.error === "0") {
                         // Successful login
                         this.props.setUser(resp.data);
                         setSessionToken(window, resp.data.sessionToken);
+                        this.props.setAuthenticated(true);
 
                         res(resp.data);
                     } else {
-                        rej({});
+                        rej(resp);
                     }
                 });
         });
diff --git a/frontend/src/models/server.ts b/frontend/src/models/server.ts
new file mode 100644
index 0000000..5b6ba2b
--- /dev/null
+++ b/frontend/src/models/server.ts
@@ -0,0 +1,4 @@
+export interface IResponse {
+    error: string;
+    data: any;
+};
diff --git a/frontend/src/pages/login.tsx b/frontend/src/pages/login.tsx
index e4a28d5..77bc749 100644
--- a/frontend/src/pages/login.tsx
+++ b/frontend/src/pages/login.tsx
@@ -11,9 +11,10 @@ import Snackbar from "@material-ui/core/Snackbar";
 import { withRouter } from "react-router-dom";
 
 import { IUser } from "../models/user";
+import { IResponse } from "../models/server";
 
 interface IProps {
-    login: (username: string, password: string) => Promise<IUser | {}>;
+    login: (username: string, password: string) => Promise<IUser | IResponse>;
     authenticated: boolean;
     history: any;
 
@@ -35,6 +36,9 @@ const LoginPageWithRouter = withRouter(
             const username = this.usernameRef.value || "";
             const password = this.passwordRef.value || "";
             this.props.login(username, password).then((res: IUser) => {
+                // Stop the loading animation
+                this.props.setLoading(false);
+
                 if (res.showWelcome) {
                     // If the user logs in for the first time, a welcome
                     // screen should be shown
@@ -42,7 +46,7 @@ const LoginPageWithRouter = withRouter(
                 } else {
                     this.props.history.push("/dashboard");
                 }
-            }, (err) => {
+            }, (err: IResponse) => {
                 this.props.setLoading(false);
                 this.props.setSnackbar(true, "Failed to log in");
             });
diff --git a/frontend/src/reducers/index.ts b/frontend/src/reducers/index.ts
index aef92df..cec60ad 100644
--- a/frontend/src/reducers/index.ts
+++ b/frontend/src/reducers/index.ts
@@ -58,7 +58,7 @@ const initialState: IState = {
     drawerButton: true,
     // Is the user authenticated?
     // TODO: Set this to false
-    authenticated: true,
+    authenticated: false,
 
     user: {
         score: 0,