diff --git a/hs-carbon.cabal b/hs-carbon.cabal
--- a/hs-carbon.cabal
+++ b/hs-carbon.cabal
@@ -1,13 +1,13 @@
 
 name:                hs-carbon
-version:             0.1.0.0
+version:             0.1.1.0
 synopsis:            A Haskell framework for parallel monte carlo simulations
 description:
   Carbon is an open-source, Haskell framework aiming to provide easy access to
   parallel Monte Carlo simulations by providing a simple, but powerful
   compositional method for building simulations and high-level functions for
   running them.
-  Examples can be found at https://github.com/icasperzen/hs-carbon-examples
+  Examples can be found at <https://github.com/icasperzen/hs-carbon-examples>
 license:             MIT
 license-file:        LICENSE
 author:              Casper M. H. Holmgreen
diff --git a/src/Data/Result.hs b/src/Data/Result.hs
--- a/src/Data/Result.hs
+++ b/src/Data/Result.hs
@@ -9,7 +9,6 @@
 where
 
 import Control.DeepSeq
-import Data.Monoid
 
 {- $description #description#
 Carbon simulations are built up from 'Control.Monad.MonteCarlo' actions.
diff --git a/src/Data/Summary/Bool.hs b/src/Data/Summary/Bool.hs
--- a/src/Data/Summary/Bool.hs
+++ b/src/Data/Summary/Bool.hs
@@ -15,7 +15,7 @@
                 , _noTotal   :: !Int
                 } deriving (Show)
 
-instance NFData BoolSumm
+instance NFData BoolSumm where rnf x = seq x ()
 
 boolSumm :: [Bool] -> BoolSumm
 boolSumm = foldl' addObs rzero
diff --git a/src/Data/Summary/Double.hs b/src/Data/Summary/Double.hs
--- a/src/Data/Summary/Double.hs
+++ b/src/Data/Summary/Double.hs
@@ -15,7 +15,7 @@
                   , _size :: !Int
 } deriving (Show)
 
-instance NFData DoubleSumm
+instance NFData DoubleSumm where rnf x = seq x ()
 
 doubleSumm :: [Double] -> DoubleSumm
 doubleSumm = foldl' addObs rzero