diff --git a/preamble.cabal b/preamble.cabal
--- a/preamble.cabal
+++ b/preamble.cabal
@@ -1,6 +1,6 @@
 cabal-version: >=1.22
 name: preamble
-version: 0.0.63
+version: 0.0.64
 license: MIT
 license-file: LICENSE
 copyright: Copyright (C) 2016 Swift Navigation, Inc.
diff --git a/src/Preamble/Types/Ctx.hs b/src/Preamble/Types/Ctx.hs
--- a/src/Preamble/Types/Ctx.hs
+++ b/src/Preamble/Types/Ctx.hs
@@ -10,6 +10,7 @@
   ) where
 
 import Control.Monad.Catch
+import Control.Monad.IO.Unlift
 import Control.Monad.Logger
 import Control.Monad.Reader
 import Preamble.Lens
@@ -36,6 +37,7 @@
   , MonadMask m
   , MonadCatch m
   , MonadThrow m
+  , MonadUnliftIO m
   , HasCtx c
   )
 
diff --git a/src/Preamble/Types/Trans.hs b/src/Preamble/Types/Trans.hs
--- a/src/Preamble/Types/Trans.hs
+++ b/src/Preamble/Types/Trans.hs
@@ -18,8 +18,8 @@
 
 import Control.Monad.Base
 import Control.Monad.Catch
-import Control.Monad.Logger
 import Control.Monad.IO.Unlift
+import Control.Monad.Logger
 import Control.Monad.Random
 import Control.Monad.Reader
 import Control.Monad.Trans.Control