diff --git a/Control/AutoUpdate/Util.hs b/Control/AutoUpdate/Util.hs
--- a/Control/AutoUpdate/Util.hs
+++ b/Control/AutoUpdate/Util.hs
@@ -10,7 +10,7 @@
 #if MIN_VERSION_base(4,6,0)
 import           Data.IORef         (atomicModifyIORef')
 #else
-import           Data.IORef         (atomicModifyIORef)
+import           Data.IORef         (IORef, atomicModifyIORef)
 -- | Strict version of 'atomicModifyIORef'.  This forces both the value stored
 -- in the 'IORef' as well as the value returned.
 atomicModifyIORef' :: IORef a -> (a -> (a,b)) -> IO b
diff --git a/auto-update.cabal b/auto-update.cabal
--- a/auto-update.cabal
+++ b/auto-update.cabal
@@ -1,5 +1,5 @@
 name:                auto-update
-version:             0.1.1.0
+version:             0.1.1.1
 synopsis:            Efficiently run periodic, on-demand actions
 description:
     A common problem is the desire to have an action run at a scheduled interval, but only if it is needed. For example, instead of having every web request result in a new @getCurrentTime@ call, we'd like to have a single worker thread run every second, updating an @IORef@. However, if the request frequency is less than once per second, this is a pessimization, and worse, kills idle GC.