diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -9,9 +9,10 @@
 import Data.Maybe
 import qualified Data.Map.Strict as Map
 import qualified Data.Sequence as Seq
-import qualified System.IO as IO
 import qualified Data.List.Split as Split
-import Debug.Trace
+import qualified Data.Monoid as Mon
+import Data.Semigroup ((<>))
+import qualified System.IO as IO
 
 -- Cabal
 import qualified Data.Text as T
@@ -144,7 +145,7 @@
     frequencyMap <-
         case input opts of
             Nothing  -> fmap FrequencyMap
-                      . P.fold (<>) (AAMap Map.empty) id
+                      . P.fold (Mon.<>) (AAMap Map.empty) id
                       $ P.stdinLn
                     >-> P.mapM (fmap unBlockMap . getBlock opts)
             (Just x) -> getFrequencyMapSingleFile opts x
diff --git a/blosum.cabal b/blosum.cabal
--- a/blosum.cabal
+++ b/blosum.cabal
@@ -1,5 +1,5 @@
 name:                blosum
-version:             0.1.1.2
+version:             0.1.1.3
 synopsis:            BLOSUM generator
 description:         Please see README.md
 homepage:            http://github.com/GregorySchwartz/blosum#readme