diff --git a/src/fellchensammlung/registration_views.py b/src/fellchensammlung/registration_views.py
new file mode 100644
index 0000000..99da41f
--- /dev/null
+++ b/src/fellchensammlung/registration_views.py
@@ -0,0 +1,29 @@
+from django.utils.html import strip_tags
+from django_registration.backends.activation.views import RegistrationView
+from django.core.mail import EmailMultiAlternatives
+from django.template.loader import render_to_string
+from django.conf import settings
+
+
+class HTMLMailRegistrationView(RegistrationView):
+    def send_activation_email(self, user):
+        """
+        overwrites the function in django registration
+        """
+        activation_key = self.get_activation_key(user)
+        context = self.get_email_context(activation_key)
+        context["user"] = user
+        subject = render_to_string(
+            template_name=self.email_subject_template,
+            context=context,
+            request=self.request,
+        )
+        # Force subject to a single line to avoid header-injection issues.
+        subject = "".join(subject.splitlines())
+        message = render_to_string(
+            template_name=self.email_body_template,
+            context=context,
+            request=self.request,
+        )
+        plain_message = strip_tags(message)
+        user.email_user(subject, plain_message, settings.DEFAULT_FROM_EMAIL, html_message=message)
diff --git a/src/fellchensammlung/templates/fellchensammlung/mail/activation_email.html b/src/fellchensammlung/templates/fellchensammlung/mail/activation_email.html
new file mode 100644
index 0000000..a5694b6
--- /dev/null
+++ b/src/fellchensammlung/templates/fellchensammlung/mail/activation_email.html
@@ -0,0 +1,24 @@
+{% extends "fellchensammlung/mail/base.html" %}
+{% load i18n %}
+{% block title %}
+    {{ site.name }}: {% trans "Account aktivieren" %}
+{% endblock %}
+
+{% block content %}
+    <p>
+        {% trans 'Hier ist dein Aktivierungs-Key. Mit diesem kannst du deinen Account freischalten.' %}
+    </p>
+    <code>
+        {{ activation_key }}
+    </code>
+
+    <p>
+        {% trans "Öffne den folgenden link im Browser und gib den Aktivierungs-Key dort ein" %}
+    </p>
+    <a href="https://{{ site.domain }}{% url 'django_registration_activate' %}"
+       class="cta-button">{% translate 'Jetzt aktivieren' %}</a>
+
+    <p>
+        {% blocktrans %}Der Link ist für {{ expiration_days }} Tage gültig.{% endblocktrans %}
+    </p>
+{% endblock %}
\ No newline at end of file
diff --git a/src/fellchensammlung/urls.py b/src/fellchensammlung/urls.py
index 9c5a3c9..428a1d1 100644
--- a/src/fellchensammlung/urls.py
+++ b/src/fellchensammlung/urls.py
@@ -1,10 +1,9 @@
 from django.urls import path, include
-from django_registration.backends.activation.views import RegistrationView
 
 from .forms import CustomRegistrationForm
 from .feeds import LatestAdoptionNoticesFeed
 
-from . import views
+from . import views, registration_views
 from drf_spectacular.views import SpectacularAPIView, SpectacularRedocView, SpectacularSwaggerView
 
 from django.contrib.sitemaps.views import sitemap
@@ -79,8 +78,9 @@ urlpatterns = [
     path('user/me/export/', views.export_own_profile, name='user-me-export'),
 
     path('accounts/register/',
-         RegistrationView.as_view(
-             form_class=CustomRegistrationForm
+         registration_views.HTMLMailRegistrationView.as_view(
+             form_class=CustomRegistrationForm,
+             email_body_template="fellchensammlung/mail/activation_email.html",
          ),
          name='django_registration_register',
          ),
diff --git a/src/templates/django_registration/activation_email_body.txt b/src/templates/django_registration/activation_email_body.txt
deleted file mode 100644
index 22d1aa9..0000000
--- a/src/templates/django_registration/activation_email_body.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-{% load i18n %}
-{{ site.name }}: {% trans "Account aktivieren" %}
-
-{% trans 'Hier ist dein Aktivierungs-Key. Mit diesem kannst du deinen Account freischalten.' %}
-{{ activation_key }}
-
-{% trans "Öffne den folgenden link im Browser und gib den Aktivierungs-Key dort ein" %}:
-https://{{ site.domain }}{% url 'django_registration_activate' %}
-
-{% blocktrans %}Der Link ist für {{ expiration_days }} Tage gültig.{% endblocktrans %}
\ No newline at end of file