diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,10 @@
+concurrent-output (1.10.10) unstable; urgency=medium
+
+  * Allow ansi-terminal-0.9.
+  * Fix a build warning.
+
+ -- Joey Hess <id@joeyh.name>  Sun, 12 May 2019 16:29:18 -0400
+
 concurrent-output (1.10.9) unstable; urgency=medium
 
   * waitDisplayChange would deadlock if the STM action passed to it did not
diff --git a/System/Console/Regions.hs b/System/Console/Regions.hs
--- a/System/Console/Regions.hs
+++ b/System/Console/Regions.hs
@@ -467,7 +467,7 @@
 waitDisplayChange a = do
 	c <- atomically $ dupTChan displayUpdateNotifier
 	bv <- newEmptyTMVarIO
-	setbarrier bv `concurrently` waitchange c bv
+	_ <- setbarrier bv `concurrently` waitchange c bv
 	snd <$> atomically (readTMVar bv)
   where
 	setbarrier bv = atomically $ do
diff --git a/concurrent-output.cabal b/concurrent-output.cabal
--- a/concurrent-output.cabal
+++ b/concurrent-output.cabal
@@ -1,5 +1,5 @@
 Name: concurrent-output
-Version: 1.10.9
+Version: 1.10.10
 Cabal-Version: >= 1.8
 License: BSD2
 Maintainer: Joey Hess <id@joeyh.name>
@@ -38,7 +38,7 @@
     , directory (>= 1.2.0 && < 1.4.0)
     , transformers (>= 0.3.0 && < 0.6.0)
     , exceptions (>= 0.6.0 && < 0.11.0)
-    , ansi-terminal (>= 0.6.0 && < 0.9.0)
+    , ansi-terminal (>= 0.9.1 && < 0.10.0)
     , terminal-size (>= 0.3.0 && < 0.4.0)
   Exposed-Modules:
     System.Console.Concurrent