diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,11 @@
+# Changelog
+
+## v0.2.1
+
+ - Support for GHC 7.4 (Justin S. Leitgeib, @jsl).
+ - Fix bug in perfdata ordering (correct order is warn, crit, min, max;
+   not min, max, warn, crit).
+
+## v0.2.0
+
+ - add addBarePerfdatum convenience function
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,4 +1,21 @@
-nagios-check
-============
+[![Build Status](https://travis-ci.org/fractalcat/haskell-nagios-check.svg?branch=master)](https://travis-ci.org/fractalcat/haskell-nagios-check)
 
+# nagios-check
+
 Write Nagios (or Icinga, Shinken, et cetera) plugins in Haskell.
+
+## Example usage
+
+```haskell
+{-# LANGUAGE OverloadedStrings #-}
+
+import System.Nagios.Plugin
+
+universeCheck :: Double -> NagiosPlugin ()
+universeCheck pi' = do
+    addResult OK "universe passes basic consistency tests"
+    if (pi' < (3.0 :: Double)) then addResult Critical "universe broken, π < 3" else return ()
+
+main :: IO ()
+main = runNagiosPlugin (universeCheck 3.1415)
+```
diff --git a/lib/System/Nagios/Plugin/Check.hs b/lib/System/Nagios/Plugin/Check.hs
--- a/lib/System/Nagios/Plugin/Check.hs
+++ b/lib/System/Nagios/Plugin/Check.hs
@@ -23,7 +23,7 @@
 ) where
 
 import           Control.Applicative
-import           Control.Monad.Catch
+import qualified Control.Monad.Catch as E
 import           Control.Monad.State.Lazy
 import           Data.Bifunctor
 import           Data.Int
@@ -35,7 +35,7 @@
 import           System.Exit
 
 -- | Nagios plugin exit statuses. Ordered by priority -
---   OK < Warning < Critical < Unknown, which correspond to plugin exit
+--   'OK' < 'Warning' < 'Critical' < 'Unknown', which correspond to plugin exit
 --   statuses of 0, 1, 2, and 3 respectively.
 data CheckStatus = OK       -- ^ Check executed successfully and
                             --   detected no service problems.
@@ -65,7 +65,7 @@
   { unCheckResult :: (CheckStatus, Text) }
     deriving (Eq, Ord, Show)
 
--- | Extract the return status from a 'CheckResult'
+-- | Extract the return status from a 'CheckResult'.
 checkStatus :: CheckResult -> CheckStatus
 checkStatus = fst . unCheckResult
 
@@ -75,7 +75,7 @@
 
 -- | Value of a performance metric.
 data PerfValue = RealValue Double | IntegralValue Int64
-  deriving Eq
+  deriving (Eq, Ord)
 
 instance Show PerfValue where
     show (RealValue x) = show x
@@ -106,16 +106,16 @@
 newtype NagiosPlugin a = NagiosPlugin
   {
     unNagiosPlugin :: StateT CheckState IO a
-  } deriving (Functor, Applicative, Monad, MonadIO, MonadState CheckState, MonadCatch, MonadThrow)
+  } deriving (Functor, Applicative, Monad, MonadIO, MonadState CheckState, E.MonadCatch, E.MonadThrow)
 
 -- | Execute a Nagios check. The program will terminate at the check's
 --   completion. A default status will provided if none is given.
 runNagiosPlugin :: NagiosPlugin a -> IO ()
 runNagiosPlugin check = do
-    (_, st) <- runNagiosPlugin' $ catch check panic
+    (_, st) <- runNagiosPlugin' $ E.catch check panic
     finishWith st
   where
-    panic :: SomeException -> NagiosPlugin a
+    panic :: E.SomeException -> NagiosPlugin a
     panic = liftIO . finishWith . panicState
 
 -- | Execute a Nagios check as with 'runNagiosPlugin', but return its
@@ -165,7 +165,7 @@
 
 -- | The state the plugin will exit with if an uncaught exception occurs.
 --   within the plugin.
-panicState :: SomeException -> CheckState
+panicState :: E.SomeException -> CheckState
 panicState = (,[]) . return . CheckResult . panicResult
   where
     panicResult e = (Critical,
@@ -188,10 +188,10 @@
         , "="
         , T.pack (show _value)
         , T.pack (show _uom)
-        , fmtThreshold _min
-        , fmtThreshold _max
         , fmtThreshold _warn
         , fmtThreshold _crit
+        , fmtThreshold _min
+        , fmtThreshold _max
         ]
 
     fmtThreshold Nothing = ";"
diff --git a/nagios-check.cabal b/nagios-check.cabal
--- a/nagios-check.cabal
+++ b/nagios-check.cabal
@@ -1,10 +1,10 @@
 name:                nagios-check
-version:             0.2.0
+version:             0.2.1
 synopsis:            Package for writing monitoring plugins
 description:         Implements Nagios plugin development guidelines
                      within a Haskell framework for writing Nagios
                      checks.
-homepage:            https://github.com/fractalcat/nagios-check
+homepage:            https://github.com/fractalcat/haskell-nagios-check
 license:             MIT
 license-file:        LICENSE
 author:              Sharif Olorin
@@ -12,12 +12,13 @@
 copyright:           2014 Sharif Olorin
 category:            System
 build-type:          Simple
-extra-source-files:  README.md
+extra-source-files:  README.md,
+                     CHANGELOG.md
 cabal-version:       >=1.10
 
 source-repository    head
-  type:              git 
-  location:          git@github.com:fractalcat/nagios-check.git
+  type:              git
+  location:          git@github.com:fractalcat/haskell-nagios-check.git
 
 library
   exposed-modules:     System.Nagios.Plugin
@@ -28,7 +29,7 @@
                        text,
                        bifunctors,
                        exceptions,
-                       nagios-perfdata
+                       nagios-perfdata >= 0.2.2
   hs-source-dirs:      lib
   default-language:    Haskell2010
   ghc-options:         -Wall
@@ -40,7 +41,7 @@
   main-is:           NagiosCheckTest.hs
   type:              exitcode-stdio-1.0
   default-language:    Haskell2010
-  build-depends:       base >=4.7 && <5,
+  build-depends:       base >=4.5 && <5,
                        hspec,
                        QuickCheck,
                        text,