diff --git a/src/SAML2/WebSSO/API.hs b/src/SAML2/WebSSO/API.hs
index 4ab4f76a..13fc914f 100644
--- a/src/SAML2/WebSSO/API.hs
+++ b/src/SAML2/WebSSO/API.hs
@@ -210,7 +210,7 @@ instance HasXMLRoot xml => MimeRender HTML (FormRedirect xml) where
                        <strong>
                          Note:
                        Since your browser does not support JavaScript, you must press the Continue button once to proceed.
-                   <form action=#{uri} method="post">
+                   <form action=#{uri} method="post" accept-charset="utf-8">
                      <input type="hidden" name="SAMLRequest" value=#{value}>
                      <noscript>
                        <input type="submit" value="Continue">
diff --git a/src/SAML2/WebSSO/XML.hs b/src/SAML2/WebSSO/XML.hs
index 659b2ade..8d018463 100644
--- a/src/SAML2/WebSSO/XML.hs
+++ b/src/SAML2/WebSSO/XML.hs
@@ -112,7 +112,7 @@ class HasXML a where
   default render :: HasXMLRoot a => a -> [Node]
   render = (:[]) . NodeElement . renderRoot
 
-  parse  :: MonadError String m => [Node] -> m a
+  parse :: MonadError String m => [Node] -> m a
 
 class HasXML a => HasXMLRoot a where
   renderRoot :: a -> Element
diff --git a/stack.yaml b/stack.yaml
index 1e641fc4..511d432f 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -3,17 +3,11 @@ resolver: lts-12.10
 packages:
 - .
 
-- location:
-    git: https://github.com/wireapp/hsaml2
-    commit: 678997815033584e023205fe774d16201ccf8f62
-  extra-dep: true
-
-- location:
-    git: https://github.com/wireapp/hspec-wai
-    commit: ca10d13deab929f1cc3a569abea2e7fbe35fdbe3  # https://github.com/hspec/hspec-wai/pull/49
-  extra-dep: true
-
 extra-deps:
+- git: https://github.com/wireapp/hsaml2
+  commit: 678997815033584e023205fe774d16201ccf8f62
+- git: https://github.com/wireapp/hspec-wai
+  commit: ca10d13deab929f1cc3a569abea2e7fbe35fdbe3  # https://github.com/hspec/hspec-wai/pull/49
 - invertible-hxt-0.1  # for hsaml2
 - servant-multipart-0.11.2
 - yaml-0.9.0