diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 ![GitHub](https://img.shields.io/github/license/mbg/wai-saml2)
 ![Haskell CI](https://github.com/mbg/wai-saml2/workflows/Haskell/badge.svg?branch=master)
+![stackage-nightly](https://github.com/mbg/wai-saml2/workflows/stackage-nightly/badge.svg)
+[![Hackage](https://img.shields.io/hackage/v/wai-saml2)](https://hackage.haskell.org/package/wai-saml2)
 
 A Haskell library which implements SAML2 assertion validation as WAI middleware. This can be used by a Haskell web application (the service provider, SP) to perform identity provider (IdP) initiated authentication, i.e. SAML2-based authentication where the authentication begins at the IdP-end, the IdP authenticates the user, and then gets the user to submit a SAML2 assertion back to the SP (known as "unsolicited SSO" within e.g. [the Shibboleth project](https://wiki.shibboleth.net/confluence/display/IDP30/UnsolicitedSSOConfiguration#UnsolicitedSSOConfiguration-SAML2.0)). 
 
@@ -18,7 +20,7 @@
 
 The library is estimated to be sufficiently robust for use in a production environment. If you wish to implement this middleware, please note the following:
 
-* You __must__ store IDs of assertions you see. If an assertion is successfully validated by this library, you __must__ check that you have not previous seen the assertion ID in order to prevent replay attacks.
+* You __must__ store IDs of assertions you see. If an assertion is successfully validated by this library, you __must__ check that you have not previously seen the assertion ID in order to prevent replay attacks.
 
 * You __must not__ expose any errors to a client as that could severely compromise the security of the system as attackers may be able to use the errors to narrow down valid SAML responses. You __should__ log and monitor errors though as they may indicate attacks on your system. Ensure that log files containing errors from the SAML2 middleware are stored securely.
 
diff --git a/wai-saml2.cabal b/wai-saml2.cabal
--- a/wai-saml2.cabal
+++ b/wai-saml2.cabal
@@ -1,20 +1,18 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.33.0.
+-- This file has been generated from package.yaml by hpack version 0.34.4.
 --
 -- see: https://github.com/sol/hpack
---
--- hash: 4a1b318c169b45fea75edde89d81f7e0c7112e165e3e3cc5d65269c91210892f
 
 name:           wai-saml2
-version:        0.2.1.2
+version:        0.2.1.3
 synopsis:       SAML2 assertion validation as WAI middleware
 description:    A Haskell library which implements SAML2 assertion validation as WAI middleware
 category:       Security
 homepage:       https://github.com/mbg/wai-saml2#readme
 bug-reports:    https://github.com/mbg/wai-saml2/issues
 author:         Michael B. Gale
-maintainer:     m.gale@warwick.ac.uk
+maintainer:     github@michael-gale.co.uk
 copyright:      Copyright (c) Michael B. Gale
 license:        MIT
 license-file:   LICENSE
@@ -45,12 +43,16 @@
       Paths_wai_saml2
   hs-source-dirs:
       src
-  default-extensions: OverloadedStrings MultiWayIf RecordWildCards FlexibleInstances
+  default-extensions:
+      OverloadedStrings
+      MultiWayIf
+      RecordWildCards
+      FlexibleInstances
   ghc-options: -W
   build-depends:
       base >=4.8 && <5
     , base64-bytestring >=0.1 && <2
-    , bytestring >=0.9 && <0.11
+    , bytestring >=0.9 && <0.12
     , c14n >=0.1.0.1 && <1
     , cryptonite <1
     , data-default-class <1