diff --git a/js/gratipay/sign-in.js b/js/gratipay/sign-in.js
index b80f525881..1a56c75b0e 100644
--- a/js/gratipay/sign-in.js
+++ b/js/gratipay/sign-in.js
@@ -13,7 +13,7 @@ Gratipay.signIn.wireUpEmailInput = function() {
     $('#sign-in-modal form.email-form').submit(function(e) {
         e.preventDefault();
         jQuery.ajax({
-            url: '/auth/send_link.json',
+            url: '/auth/send-link.json',
             type: 'POST',
             data: {
                 'email_address': $(this).find('input').val()
diff --git a/tests/py/test_www_email_auth.py b/tests/py/test_www_email_auth.py
index 597868bf12..d1e5f7ca8b 100644
--- a/tests/py/test_www_email_auth.py
+++ b/tests/py/test_www_email_auth.py
@@ -11,23 +11,23 @@
 class TestSendLink(Harness):
     def test_returns_json(self):
         self.make_participant('alice', email_address='alice@gratipay.com')
-        response = self.client.POST('/auth/send_link.json', {'email_address': 'alice@gratipay.com'})
+        response = self.client.POST('/auth/send-link.json', {'email_address': 'alice@gratipay.com'})
 
         message = json.loads(response.body)['message']
         assert message == "We've sent you a link to sign in. Please check your inbox."
 
     def test_only_allows_post(self):
-        response = self.client.GxT('/auth/send_link.json')
+        response = self.client.GxT('/auth/send-link.json')
 
         assert response.code == 405
 
     def test_400_for_no_email_address_parameter(self):
-        response = self.client.PxST('/auth/send_link.json')
+        response = self.client.PxST('/auth/send-link.json')
 
         assert response.code == 400
 
     def test_400_for_invalid_email(self):
-        response = self.client.POST('/auth/send_link.json', {'email_address': 'dummy@gratipay.com'})
+        response = self.client.POST('/auth/send-link.json', {'email_address': 'dummy@gratipay.com'})
 
         message = json.loads(response.body)['message']
         assert message == "We've sent you a link to create an account. Please check your inbox."
@@ -35,14 +35,14 @@ def test_400_for_invalid_email(self):
 class TestSendLinkEmail(QueuedEmailHarness):
     def test_sends_signin_email(self):
         self.make_participant('alice', email_address='alice@gratipay.com')
-        self.client.POST('/auth/send_link.json', {'email_address': 'alice@gratipay.com'})
+        self.client.POST('/auth/send-link.json', {'email_address': 'alice@gratipay.com'})
 
         assert self.get_last_email()['to'] == 'alice <alice@gratipay.com>'
         assert 'Click the link below to sign in to Gratipay' in self.get_last_email()['body_text']
         assert 'Click the button below to sign in to Gratipay' in self.get_last_email()['body_html']
 
     def test_sends_signup_email(self):
-        self.client.POST('/auth/send_link.json', {'email_address': 'new@gratipay.com'})
+        self.client.POST('/auth/send-link.json', {'email_address': 'new@gratipay.com'})
 
         assert self.get_last_email()['to'] == 'new@gratipay.com'
         assert 'Click the link below to create an account on Gratipay' in self.get_last_email()['body_text']
diff --git a/www/auth/send_link.json.spt b/www/auth/send-link.json.spt
similarity index 100%
rename from www/auth/send_link.json.spt
rename to www/auth/send-link.json.spt