diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -2,15 +2,17 @@
 
 module Main where
 
-import Control.Monad.Logger(LoggingT(..), runStdoutLoggingT, logInfoNS, logDebugNS, logWarnNS, logErrorNS, MonadLogger)
 import Network.Mime(defaultMimeLookup)
 import Options
 import qualified Data.ByteString.Lazy as LBS
 import Data.Digest.Pure.SHA
+import System.Log.Heavy
 import Speechmatics.Client 
 import Network.Mime(MimeType)
 import Data.Text(pack, Text)
 import           Data.Aeson                  (decode)
+import System.Log.Heavy.Backends (defStdoutSettings)
+import System.Log.Heavy.Types(LoggingSettings(..))
 
 data MainOptions = MainOptions
     { 
@@ -35,6 +37,7 @@
     Nothing -> print "wrong options, see --help"
     Just compute -> compute
 
+runStdoutLoggingT = withLoggingT $ LoggingSettings defStdoutSettings
 withBearAndFile :: UserID -> AuthToken -> FilePath -> IO() 
 withBearAndFile userId bearToken file = do 
   -- result <- transcribeFile bearToken file 
diff --git a/speechmatics.cabal b/speechmatics.cabal
--- a/speechmatics.cabal
+++ b/speechmatics.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: cc509a2a8595bbf451ac07ba7f538d6fce13a779255b88f9e04880c1420bb01b
+-- hash: 647d0f891a79463d3078719ace8c4e3709d4edaf328525db0ea3f6f294e05b58
 
 name:           speechmatics
-version:        0.6.0.0
+version:        0.7.0.0
 synopsis:       Speechmatics api client
 description:    Upload audio files to speechmatics to get a transcription
 category:       API
@@ -30,15 +30,16 @@
     , aeson
     , base >=4.7 && <5
     , bytestring
+    , heavy-logger
     , http-client
     , http-client-openssl
     , http-types
     , json-autotype
     , lens
     , mime-types
-    , monad-logger
     , mtl
     , text
+    , text-format-heavy
     , wreq
   exposed-modules:
       Speechmatics.Client
@@ -58,12 +59,13 @@
     , aeson
     , base >=4.7 && <5
     , bytestring
+    , heavy-logger
     , mime-types
-    , monad-logger
     , mtl
     , options
     , speechmatics
     , text
+    , text-format-heavy
   other-modules:
       Paths_speechmatics
   default-language: Haskell2010
@@ -77,12 +79,13 @@
   build-depends:
       base >=4.7 && <5
     , bytestring
+    , heavy-logger
     , hspec
-    , monad-logger
     , mtl
     , neat-interpolation
     , speechmatics
     , text
+    , text-format-heavy
   other-modules:
       PeekJobSpec
       PostJobSpec
diff --git a/src/Speechmatics/Client.hs b/src/Speechmatics/Client.hs
--- a/src/Speechmatics/Client.hs
+++ b/src/Speechmatics/Client.hs
@@ -32,23 +32,24 @@
 import           Network.Mime                (MimeType)
 import           Network.Wreq
 
-import           Control.Monad.Logger        (LoggingT (..), MonadLogger,
-                                              logDebugNS, logErrorNS, logInfoNS,
-                                              logWarnNS, runStdoutLoggingT)
+import System.Log.Heavy.LoggingT(LoggingT(..))
+import qualified System.Log.Heavy.Shortcuts as Logcut (info, debug)
+import Data.Text.Format.Heavy.Instances (Single(..))
 import qualified Data.ByteString.Char8       as C8BS
 import qualified Data.ByteString.Lazy        as LBS
 import qualified Data.ByteString.Lazy.Char8  as C8LBS
 import           Data.Maybe
 import           Data.Monoid
 import           Data.Text
+import            qualified Data.Text.Lazy as Lazy
 import qualified Network.Wreq.Session        as Sess
 import qualified Speechmatics.JSON.PeekJob   as Peek
 import qualified Speechmatics.JSON.PostJob   as Post
 
 source :: Text
 source = "Speechmatics client"
-info = logInfoNS source
-debug = logDebugNS source
+info d = Logcut.info (Lazy.fromStrict d) (Single source)
+debug d = Logcut.debug (Lazy.fromStrict d) (Single source)
 -- warn = logWarnNS source
 -- error = logErrorNS source