diff --git a/prototype/src/main/resources/templates/register.html b/prototype/src/main/resources/templates/register.html
index e1ca4ea..b7ae69d 100644
--- a/prototype/src/main/resources/templates/register.html
+++ b/prototype/src/main/resources/templates/register.html
@@ -20,7 +20,7 @@
+ pattern="[^@\s]+@[^\.\s]+\.[^\s]+" required>
diff --git a/prototype/src/main/resources/templates/user/settings.html b/prototype/src/main/resources/templates/user/settings.html
index 3348166..8bae9f9 100644
--- a/prototype/src/main/resources/templates/user/settings.html
+++ b/prototype/src/main/resources/templates/user/settings.html
@@ -28,7 +28,7 @@