diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
 # QR Imager Library
+[![Build Status](https://travis-ci.org/vmchale/QR-writer.svg?branch=master)](https://travis-ci.org/vmchale/QR-writer)
+
 This is a library to generate `.png` files from QR codes.
 
 ## Dependencies
diff --git a/qr-imager.cabal b/qr-imager.cabal
--- a/qr-imager.cabal
+++ b/qr-imager.cabal
@@ -1,5 +1,5 @@
 name: qr-imager
-version: 0.2.1.3
+version: 0.2.2.0
 cabal-version: >=1.10
 build-type: Simple
 license: BSD3
@@ -41,6 +41,7 @@
         process >=1.4.2.0 && <1.5,
         MissingH >=1.4.0.1 && <1.5,
         optparse-applicative >=0.12.1.0 && <0.13
+    pkgconfig-depends: libqrencode -any
     default-language: Haskell2010
     hs-source-dirs: src
     other-modules:
@@ -50,18 +51,18 @@
     main-is: Main.hs
     build-depends:
         base >=4.9.0.0 && <4.10,
-        qr-imager >=0.2.1.3 && <0.3
+        qr-imager >=0.2.2.0 && <0.3
     default-language: Haskell2010
     hs-source-dirs: app
-    ghc-options: -threaded -rtsopts -with-rtsopts=-N -O3 -fllvm -optlo-O3
+    ghc-options: -threaded -rtsopts -with-rtsopts=-N
 
 test-suite test-lib
     type: exitcode-stdio-1.0
     main-is: Spec.hs
     build-depends:
         base >=4.9.0.0 && <4.10,
-        qr-imager >=0.2.1.3 && <0.3,
-        process >=1.4.2.0 && <1.5
+        qr-imager >=0.2.2.0 && <0.3,
+        hspec >=2.2.4 && <2.3
     default-language: Haskell2010
     hs-source-dirs: test
     ghc-options: -threaded -rtsopts -with-rtsopts=-N
diff --git a/src/Data/QRCodes.hs b/src/Data/QRCodes.hs
--- a/src/Data/QRCodes.hs
+++ b/src/Data/QRCodes.hs
@@ -76,10 +76,10 @@
 readQRStrSec :: FilePath -> FilePath -> IO String
 readQRStrSec filepath keyfile = do
     enc <- (map toLower) . init . (drop 8) . (view _2) <$> readCreateProcessWithExitCode (shell $ "zbarimg " ++ filepath) ""
-    (fmap $ liftEither show) . (flip checkSigFile keyfile) . resolveUpper $ (BS.pack) enc
+    (fmap $ liftEither BS.unpack) . (flip checkSigFile keyfile) . resolveUpper $ (BS.pack) enc
 
 -- | Read an image containing a QR code, decode and verify the signature using the given key.
 readQRStrSec' :: FilePath -> (PublicKey, PrivateKey) -> IO String
 readQRStrSec' filepath key = do
     enc <- (map toLower) . init . (drop 8) . (view _2) <$> readCreateProcessWithExitCode (shell $ "zbarimg " ++ filepath) ""
-    (fmap $ liftEither show) . (flip checkSig key) . resolveUpper $ (BS.pack) enc
+    (fmap $ liftEither BS.unpack) . (flip checkSig key) . resolveUpper $ (BS.pack) enc
diff --git a/test/Spec.hs b/test/Spec.hs
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -1,4 +1,16 @@
-import System.Process
+{-# LANGUAGE OverloadedStrings #-} 
 
+import Data.QRCodes
+import Test.Hspec
+
 main :: IO ()
-main = readCreateProcess (shell "echo 'hello friend' | qrpipe write -v -s output.png") "" >>= putStrLn
+main = hspec $ do
+  describe "Data.QRCodes" $ do
+    it "writes a QR code" $ do
+      byteStringToQR "hello world" "qrcode.png" >>= (`shouldBe` ())
+    it "reads a QR code" $ do
+      readQRString "qrcode.png" >>= (`shouldBe` "hello world")
+    it "writes a secure QR code" $ do
+      byteStringToQRSec "helloworld" ".key.hk" "qrcode-sec.png" >>= (`shouldBe` ())
+    it "reads a secire QR code" $ do
+      readQRStrSec "qrcode-sec.png" ".key.hk" >>= (`shouldBe` "helloworld")