diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+# 2.3.0
+
+* BREAKING CHANGE: `syncIO` now expects a `MonadIO` constraint instead of
+  `UnexceptionalIO`
+    * `syncIO` also changes how it detects asynchronous exceptions.  It now
+      decides based on whether or not an exception inherits from
+      `SomeAsyncException`
+    * See: https://github.com/Gabriel439/Haskell-Errors-Library/pull/53
+
 # 2.2.5
 
 * Increase upper bound on `exceptions`
diff --git a/Control/Error/Util.hs b/Control/Error/Util.hs
--- a/Control/Error/Util.hs
+++ b/Control/Error/Util.hs
@@ -67,11 +67,9 @@
 import Data.Maybe (fromMaybe)
 import Data.Text (Text)
 import System.IO (stderr)
-import UnexceptionalIO (Unexceptional)
 
 import qualified Control.Exception as Exception
 import qualified Data.Text.IO
-import qualified UnexceptionalIO   as UIO
 
 -- | Fold an 'ExceptT' by providing one continuation for each constructor
 exceptT :: Monad m => (a -> m c) -> (b -> m c) -> ExceptT a m b -> m c
@@ -276,5 +274,11 @@
 {-| Catch all exceptions, except for asynchronous exceptions found in @base@
     and convert them to the 'ExceptT' monad
 -}
-syncIO :: Unexceptional m => IO a -> ExceptT SomeException m a
-syncIO = ExceptT . UIO.liftUIO . UIO.fromIO
+syncIO :: MonadIO m => IO a -> ExceptT SomeException m a
+syncIO = ExceptT . liftIO . trySync
+
+trySync :: IO a -> IO (Either SomeException a)
+trySync io = (fmap Right io) `Exception.catch` \e ->
+  case Exception.fromException e of
+    Just (Exception.SomeAsyncException _) -> Exception.throwIO e
+    Nothing -> return (Left e)
diff --git a/errors.cabal b/errors.cabal
--- a/errors.cabal
+++ b/errors.cabal
@@ -1,8 +1,8 @@
 Name: errors
-Version: 2.2.5
+Version: 2.3.0
 Cabal-Version: >=1.8.0.2
 Build-Type: Simple
-Tested-With: GHC == 7.6.3, GHC == 7.8.4, GHC == 7.10.2, GHC == 8.0.1
+Tested-With: GHC == 7.8.4, GHC == 7.10.2, GHC == 8.0.1
 License: BSD3
 License-File: LICENSE
 Copyright: 2012, 2013 Gabriel Gonzalez
@@ -24,12 +24,11 @@
 
 Library
     Build-Depends:
-        base                >= 4     && < 5   ,
+        base                >= 4.7   && < 5   ,
         exceptions          >= 0.6   && < 0.11,
         text                            < 1.3 ,
         transformers        >= 0.2   && < 0.6 ,
-        transformers-compat >= 0.4   && < 0.7 ,
-        unexceptionalio     >= 0.3   && < 0.4
+        transformers-compat >= 0.4   && < 0.7
     if impl(ghc <= 7.6.3)
         Build-Depends:
             safe            >= 0.3.3 && < 0.3.10