diff --git a/sitepipe.cabal b/sitepipe.cabal
--- a/sitepipe.cabal
+++ b/sitepipe.cabal
@@ -1,13 +1,13 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.31.2.
+-- This file has been generated from package.yaml by hpack version 0.34.4.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 5a453abb6e39bab8e144fe4a04baaa85079c83e83b6f2dd5bf17815fe2caf475
+-- hash: 2b95377f0988f7b8382de79b6d22f8bac849ba209269cf42f92490c72a472436
 
 name:           sitepipe
-version:        0.4.0.1
+version:        0.4.0.2
 synopsis:       A simple to understand static site generator
 category:       Web
 homepage:       https://github.com/ChrisPenner/sitepipe#readme
@@ -17,7 +17,8 @@
 copyright:      2017 Chris Penner
 license:        BSD3
 license-file:   LICENSE
-tested-with:    GHC==8.0.2 GHC==8.2.1
+tested-with:
+    GHC==8.0.2 GHC==8.2.1
 build-type:     Simple
 extra-source-files:
     README.md
@@ -44,7 +45,7 @@
       Glob
     , MissingH
     , aeson
-    , base >=4.12 && <5
+    , base <5
     , bytestring
     , containers
     , directory
diff --git a/src/SitePipe/Readers.hs b/src/SitePipe/Readers.hs
--- a/src/SitePipe/Readers.hs
+++ b/src/SitePipe/Readers.hs
@@ -16,7 +16,7 @@
   ) where
 
 import Control.Monad.Trans.Except
-import Control.Monad.Trans.State.Strict
+import Control.Monad.Trans.State
 import Control.Monad.Catch
 import Text.Pandoc
 import Text.Pandoc.Options