diff --git a/hspec-wai.cabal b/hspec-wai.cabal
--- a/hspec-wai.cabal
+++ b/hspec-wai.cabal
@@ -1,9 +1,9 @@
--- This file has been generated from package.yaml by hpack version 0.15.0.
+-- This file has been generated from package.yaml by hpack version 0.19.3.
 --
 -- see: https://github.com/sol/hpack
 
 name:             hspec-wai
-version:          0.8.0
+version:          0.9.0
 homepage:         https://github.com/hspec/hspec-wai#readme
 bug-reports:      https://github.com/hspec/hspec-wai/issues
 license:          MIT
@@ -32,18 +32,18 @@
       src
   ghc-options: -Wall
   build-depends:
-      base == 4.*
+      QuickCheck
+    , base ==4.*
     , base-compat
-    , bytestring >= 0.10
-    , text
-    , transformers
+    , bytestring >=0.10
     , case-insensitive
+    , hspec-core ==2.*
+    , hspec-expectations >=0.8.0
     , http-types
-    , wai >= 3
-    , wai-extra >= 3
-    , hspec-core == 2.*
-    , hspec-expectations >= 0.8.0
-    , QuickCheck
+    , text
+    , transformers
+    , wai >=3
+    , wai-extra >=3
   exposed-modules:
       Test.Hspec.Wai
       Test.Hspec.Wai.QuickCheck
@@ -62,20 +62,19 @@
       test
   ghc-options: -Wall
   build-depends:
-      base == 4.*
+      QuickCheck
+    , base ==4.*
     , base-compat
-    , bytestring >= 0.10
-    , text
-    , transformers
+    , bytestring >=0.10
     , case-insensitive
-    , http-types
-    , wai >= 3
-    , wai-extra >= 3
-    , hspec-core == 2.*
-    , hspec-expectations >= 0.8.0
-    , QuickCheck
     , hspec
-    , QuickCheck
+    , hspec-core ==2.*
+    , hspec-expectations >=0.8.0
+    , http-types
+    , text
+    , transformers
+    , wai >=3
+    , wai-extra >=3
   other-modules:
       Test.Hspec.Wai
       Test.Hspec.Wai.Internal
@@ -85,4 +84,5 @@
       Test.Hspec.Wai.MatcherSpec
       Test.Hspec.Wai.UtilSpec
       Test.Hspec.WaiSpec
+      Paths_hspec_wai
   default-language: Haskell2010
diff --git a/src/Test/Hspec/Wai.hs b/src/Test/Hspec/Wai.hs
--- a/src/Test/Hspec/Wai.hs
+++ b/src/Test/Hspec/Wai.hs
@@ -99,7 +99,7 @@
 -- `matchHeaders`:
 --
 -- > get "/" `shouldRespondWith` "foo" {matchHeaders = ["Content-Type" <:> "text/plain"]}
--- > -- matches if body is "foo", status is 200 and ther is a header field "Content-Type: text/plain"
+-- > -- matches if body is "foo", status is 200 and there is a header field "Content-Type: text/plain"
 shouldRespondWith :: HasCallStack => WaiSession SResponse -> ResponseMatcher -> WaiExpectation
 shouldRespondWith action matcher = do
   r <- action
@@ -141,6 +141,6 @@
 -- The specified list of key-value pairs is encoded as
 -- @application/x-www-form-urlencoded@ and used as request body.
 --
--- In additon the @Content-Type@ is set to @application/x-www-form-urlencoded@.
+-- In addition the @Content-Type@ is set to @application/x-www-form-urlencoded@.
 postHtmlForm :: ByteString -> [(String, String)] -> WaiSession SResponse
 postHtmlForm path = request methodPost path [(hContentType, "application/x-www-form-urlencoded")] . formUrlEncodeQuery
diff --git a/src/Test/Hspec/Wai/Matcher.hs b/src/Test/Hspec/Wai/Matcher.hs
--- a/src/Test/Hspec/Wai/Matcher.hs
+++ b/src/Test/Hspec/Wai/Matcher.hs
@@ -7,6 +7,7 @@
 , (<:>)
 , bodyEquals
 , match
+, formatHeader
 ) where
 
 import           Prelude ()