diff --git a/prototype/src/main/resources/templates/register.html b/prototype/src/main/resources/templates/register.html
index 613cbfc..e1ca4ea 100644
--- a/prototype/src/main/resources/templates/register.html
+++ b/prototype/src/main/resources/templates/register.html
@@ -19,7 +19,8 @@
             </div>
             <div>
                <label for="username">Email Adresse</label>
-               <input class="full-width" type="text" name="username" placeholder="Email Adresse" id="username" required>
+               <input class="full-width" type="text" name="username" placeholder="Email Adresse" id="username"
+                      pattern="[^@]+@[^\.]+\..+" required>
             </div>
             <div>
                <label for="password">Passwort</label>
diff --git a/prototype/src/main/resources/templates/user/settings.html b/prototype/src/main/resources/templates/user/settings.html
index 167863f..3348166 100644
--- a/prototype/src/main/resources/templates/user/settings.html
+++ b/prototype/src/main/resources/templates/user/settings.html
@@ -27,7 +27,8 @@
             </div>
             <div>
                 <div class="input-icon">
-                    <input class="full-width" type="text" name="email" th:value="${user.email}" required/>
+                    <input class="full-width" type="text" name="email" th:value="${user.email}"
+                           pattern="[^@]+@[^\.]+\..+" required/>
                     <button> Email-Adresse ändern</button>
                 </div>
             </div>