diff --git a/package.json b/package.json
index b04d97d..6a49a13 100644
--- a/package.json
+++ b/package.json
@@ -57,6 +57,8 @@
     "angular-resource": "^1.6",
     "angular-strap": "^2.3.12",
     "angular-ui-notification": "^0.3",
+    "angular2-modal": "^3.0.1",
+    "angular2-notifications": "^0.7.4",
     "base64util": "^1.0.2",
     "bootbox": "^4.4.0",
     "bootstrap": "^3.3.7",
diff --git a/src/accounts/accountForm.component.ts b/src/accounts/accountForm.component.ts
index 61f9172..84f0de2 100644
--- a/src/accounts/accountForm.component.ts
+++ b/src/accounts/accountForm.component.ts
@@ -34,13 +34,11 @@ import { Account } from './account';
 
     <div class="col-sm-8">
       <div class="input-group">
-        <div class="input-group-addon">-</div>
-
         <input class="form-control"
           type="number" placeholder="Authorized overdraft"
           id="authorized-overdraft" name="authorized_overdraft"
           [(ngModel)]="account.authorized_overdraft" #authorizedOverdraft="ngModel"
-          required min="0">
+          required max="0">
 
         <div class="input-group-addon">.00€</div>
       </div>
@@ -50,8 +48,8 @@ import { Account } from './account';
           The authorized overdraft is required.
         </p>
 
-        <p [hidden]="!authorizedOverdraft.errors.min">
-          The authorized overdraft must be equal or greater than 0.
+        <p [hidden]="!authorizedOverdraft.errors.max">
+          The authorized overdraft must be less than or equal to 0.
         </p>
       </div>
     </div>