diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -1,2 +1,4 @@
 import Distribution.Simple
+
+
 main = defaultMain
diff --git a/hs-opentelemetry-exporter-in-memory.cabal b/hs-opentelemetry-exporter-in-memory.cabal
--- a/hs-opentelemetry-exporter-in-memory.cabal
+++ b/hs-opentelemetry-exporter-in-memory.cabal
@@ -1,20 +1,20 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.34.4.
+-- This file has been generated from package.yaml by hpack version 0.35.2.
 --
 -- see: https://github.com/sol/hpack
 
-name:           hs-opentelemetry-exporter-in-memory
-version:        0.0.1.2
-description:    Please see the README on GitHub at <https://github.com/iand675/hs-opentelemetry/tree/main/exporters/in-memory#readme>
-homepage:       https://github.com/iand675/hs-opentelemetry#readme
-bug-reports:    https://github.com/iand675/hs-opentelemetry/issues
-author:         Ian Duncan
-maintainer:     ian@iankduncan.com
-copyright:      2021 Ian Duncan
-license:        BSD3
-license-file:   LICENSE
-build-type:     Simple
+name:               hs-opentelemetry-exporter-in-memory
+version:            0.0.1.3
+description:        Please see the README on GitHub at <https://github.com/iand675/hs-opentelemetry/tree/main/exporters/in-memory#readme>
+homepage:           https://github.com/iand675/hs-opentelemetry#readme
+bug-reports:        https://github.com/iand675/hs-opentelemetry/issues
+author:             Ian Duncan
+maintainer:         ian@iankduncan.com
+copyright:          2021 Ian Duncan
+license:            BSD3
+license-file:       LICENSE
+build-type:         Simple
 extra-source-files:
     README.md
     ChangeLog.md
@@ -34,7 +34,7 @@
   build-depends:
       async
     , base >=4.7 && <5
-    , hs-opentelemetry-api ==0.0.3.*
+    , hs-opentelemetry-api >=0.0.3 && <0.2
     , unagi-chan
   default-language: Haskell2010
 
@@ -49,7 +49,7 @@
   build-depends:
       async
     , base >=4.7 && <5
-    , hs-opentelemetry-api ==0.0.3.*
+    , hs-opentelemetry-api >=0.0.3 && <0.2
     , hs-opentelemetry-exporter-in-memory
     , unagi-chan
   default-language: Haskell2010
diff --git a/src/OpenTelemetry/Exporter/InMemory.hs b/src/OpenTelemetry/Exporter/InMemory.hs
--- a/src/OpenTelemetry/Exporter/InMemory.hs
+++ b/src/OpenTelemetry/Exporter/InMemory.hs
@@ -1,43 +1,49 @@
-module OpenTelemetry.Exporter.InMemory 
-  ( inMemoryChannelExporter
-  , inMemoryListExporter
-  , module Control.Concurrent.Chan.Unagi
-  ) where
+module OpenTelemetry.Exporter.InMemory (
+  inMemoryChannelExporter,
+  inMemoryListExporter,
+  module Control.Concurrent.Chan.Unagi,
+) where
 
 import Control.Concurrent.Async
 import Control.Concurrent.Chan.Unagi
 import Control.Monad.IO.Class
 import Data.IORef
-import OpenTelemetry.Trace.Core
 import OpenTelemetry.Processor
+import OpenTelemetry.Trace.Core
 
--- | Access exported spans via a concurrently accessible channel that produces spans. 
--- The spans are exported in the order that the spans end.
-inMemoryChannelExporter :: MonadIO m => m (Processor, OutChan ImmutableSpan)
+
+{- | Access exported spans via a concurrently accessible channel that produces spans.
+ The spans are exported in the order that the spans end.
+-}
+inMemoryChannelExporter :: (MonadIO m) => m (Processor, OutChan ImmutableSpan)
 inMemoryChannelExporter = liftIO $ do
   (inChan, outChan) <- newChan
-  let processor = Processor 
-        { processorOnStart = \_ _ -> pure () 
-        , processorOnEnd = \ref -> do
-          writeChan inChan =<< readIORef ref
-        , processorShutdown = do
-          async $ pure ShutdownSuccess
-        , processorForceFlush = pure ()
-        }
+  let processor =
+        Processor
+          { processorOnStart = \_ _ -> pure ()
+          , processorOnEnd = \ref -> do
+              writeChan inChan =<< readIORef ref
+          , processorShutdown = do
+              async $ pure ShutdownSuccess
+          , processorForceFlush = pure ()
+          }
   pure (processor, outChan)
 
--- | Access exported spans via a mutable reference to a list of spans. The spans
--- are not guaranteed to be exported in a particular order.
-inMemoryListExporter :: MonadIO m => m (Processor, IORef [ImmutableSpan])
+
+{- | Access exported spans via a mutable reference to a list of spans. The spans
+ are not guaranteed to be exported in a particular order.
+-}
+inMemoryListExporter :: (MonadIO m) => m (Processor, IORef [ImmutableSpan])
 inMemoryListExporter = liftIO $ do
   listRef <- newIORef []
-  let processor = Processor 
-        { processorOnStart = \_ _ -> pure () 
-        , processorOnEnd = \ref -> do
-          s <- readIORef ref
-          atomicModifyIORef listRef (\l -> (s : l, ()))
-        , processorShutdown = do
-          async $ pure ShutdownSuccess
-        , processorForceFlush = pure ()
-        }
+  let processor =
+        Processor
+          { processorOnStart = \_ _ -> pure ()
+          , processorOnEnd = \ref -> do
+              s <- readIORef ref
+              atomicModifyIORef listRef (\l -> (s : l, ()))
+          , processorShutdown = do
+              async $ pure ShutdownSuccess
+          , processorForceFlush = pure ()
+          }
   pure (processor, listRef)
diff --git a/test/Spec.hs b/test/Spec.hs
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -1,2 +1,3 @@
+
 main :: IO ()
 main = putStrLn "Test suite not yet implemented"