diff --git a/src/Network/Wai/MakeAssets.hs b/src/Network/Wai/MakeAssets.hs
--- a/src/Network/Wai/MakeAssets.hs
+++ b/src/Network/Wai/MakeAssets.hs
@@ -14,7 +14,6 @@
 import           Control.Monad
 import           Data.Default
 import           Data.List (intercalate)
-import           Data.Monoid
 import           Data.String.Conversions
 import           Development.Shake (cmd, Exit(..), Stderr(..), CmdOption(..))
 import           Network.HTTP.Types.Status
diff --git a/test/Network/Wai/MakeAssetsSpec.hs b/test/Network/Wai/MakeAssetsSpec.hs
--- a/test/Network/Wai/MakeAssetsSpec.hs
+++ b/test/Network/Wai/MakeAssetsSpec.hs
@@ -104,4 +104,4 @@
 
 acceptErrors :: Wreq.Options
 acceptErrors = defaults &
-  checkStatus .~ Just (\ _ _ _ -> Nothing)
+  checkResponse .~ Just (\ _ _ -> return ())
diff --git a/wai-make-assets.cabal b/wai-make-assets.cabal
--- a/wai-make-assets.cabal
+++ b/wai-make-assets.cabal
@@ -1,9 +1,11 @@
--- This file has been generated from package.yaml by hpack version 0.14.0.
+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.34.4.
 --
 -- see: https://github.com/sol/hpack
 
 name:           wai-make-assets
-version:        0.2
+version:        0.3
 synopsis:       Compiling and serving assets
 description:    Small wai library and command line tool for compiling and serving assets (e.g. through ghcjs, elm, sass)
 category:       Development
@@ -13,79 +15,81 @@
 license:        BSD3
 license-file:   LICENSE
 build-type:     Simple
-cabal-version:  >= 1.10
 
 source-repository head
   type: git
   location: https://github.com/soenkehahn/wai-make-assets
 
 library
+  exposed-modules:
+      Network.Wai.MakeAssets
+  other-modules:
+      Paths_wai_make_assets
   hs-source-dirs:
       src
   ghc-options: -Wall -fno-warn-name-shadowing
   build-depends:
-      base < 99
-    , wai-app-static
-    , wai
-    , warp
-    , string-conversions
+      base <99
     , bytestring
     , data-default
+    , directory
     , filepath
-    , shake
     , http-types
-    , directory
-  exposed-modules:
-      Network.Wai.MakeAssets
+    , shake
+    , string-conversions
+    , wai
+    , wai-app-static
+    , warp
   default-language: Haskell2010
 
 executable wai-make-assets
   main-is: wai-make-assets.hs
+  other-modules:
+      Network.Wai.MakeAssets
+      Paths_wai_make_assets
   hs-source-dirs:
       src
   ghc-options: -Wall -fno-warn-name-shadowing
   build-depends:
-      base < 99
-    , wai-app-static
-    , wai
-    , warp
-    , string-conversions
+      base <99
     , bytestring
     , data-default
-    , filepath
-    , shake
-    , http-types
     , directory
+    , filepath
     , getopt-generics
-  other-modules:
-      Network.Wai.MakeAssets
+    , http-types
+    , shake
+    , string-conversions
+    , wai
+    , wai-app-static
+    , warp
   default-language: Haskell2010
 
 test-suite spec
   type: exitcode-stdio-1.0
   main-is: Spec.hs
+  other-modules:
+      Network.Wai.MakeAssetsSpec
+      Paths_wai_make_assets
   hs-source-dirs:
       test
-    , src
   ghc-options: -Wall -fno-warn-name-shadowing
   build-depends:
-      base < 99
-    , wai-app-static
-    , wai
-    , warp
-    , string-conversions
+      base <99
     , bytestring
     , data-default
-    , filepath
-    , shake
-    , http-types
     , directory
+    , filepath
     , hspec
-    , wreq
-    , mockery
+    , http-types
     , lens
+    , mockery
+    , shake
     , silently
-  other-modules:
-      Network.Wai.MakeAssetsSpec
-      Network.Wai.MakeAssets
+    , string-conversions
+    , wai
+    , wai-app-static
+    , wai-make-assets
+    , warp
+    , wreq
   default-language: Haskell2010