diff --git a/lib/philomena_web/templates/pow/registration/edit.html.slime b/lib/philomena_web/templates/pow/registration/edit.html.slime
index f6a475aa..f42b194e 100644
--- a/lib/philomena_web/templates/pow/registration/edit.html.slime
+++ b/lib/philomena_web/templates/pow/registration/edit.html.slime
@@ -35,7 +35,7 @@ p
 
   h3 Email address
   .field
-    = text_input f, :email, class: "input", placeholder: "Email", required: true
+    = text_input f, :email, class: "input", placeholder: "Email", required: true, pattern: ".*@.*"
     = error_tag f, :email
 
   h3 Change Password
@@ -60,4 +60,4 @@ p
     .fieldlabel
       ' We need your current password to confirm all of these changes
 
-  = submit "Save Account", class: "button"
\ No newline at end of file
+  = submit "Save Account", class: "button"
diff --git a/lib/philomena_web/templates/pow/registration/new.html.slime b/lib/philomena_web/templates/pow/registration/new.html.slime
index 69aa4201..4729517f 100644
--- a/lib/philomena_web/templates/pow/registration/new.html.slime
+++ b/lib/philomena_web/templates/pow/registration/new.html.slime
@@ -16,7 +16,7 @@ h1 Register
     ' You'll use your email address to log in, and we'll use this to get in
     ' touch if we need to. Don't worry, we won't share this or spam you.
   .field
-    = text_input f, :email, class: "input", placeholder: "Email", required: true
+    = text_input f, :email, class: "input", placeholder: "Email", required: true, pattern: ".*@.*"
     = error_tag f, :email
 
   .fieldlabel
@@ -47,4 +47,4 @@ h1 Register
 
   br
 
-  = submit "Sign Up", class: "button"
\ No newline at end of file
+  = submit "Sign Up", class: "button"
diff --git a/lib/philomena_web/templates/pow/session/new.html.slime b/lib/philomena_web/templates/pow/session/new.html.slime
index f9baa1aa..d9673999 100644
--- a/lib/philomena_web/templates/pow/session/new.html.slime
+++ b/lib/philomena_web/templates/pow/session/new.html.slime
@@ -8,7 +8,7 @@ h1 Sign in
   p = link "Forgot your password?", to: Routes.pow_reset_password_reset_password_path(@conn, :new)
 
   .field
-    = text_input f, :email, class: "input", required: true, placeholder: "Email", autofocus: true
+    = text_input f, :email, class: "input", required: true, placeholder: "Email", autofocus: true, pattern: ".*@.*"
     = error_tag f, :email
 
   .field