diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,9 @@
+concurrent-output (1.10.6) unstable; urgency=medium
+
+  * Relax unix bound for ghc 8.6.
+
+ -- Joey Hess <id@joeyh.name>  Mon, 02 Jul 2018 10:58:59 -0400
+
 concurrent-output (1.10.5) unstable; urgency=medium
 
   * Allow exceptions-0.10.
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: 1.10.5
+Version: 1.10.6
 Cabal-Version: >= 1.8
 License: BSD2
 Maintainer: Joey Hess <id@joeyh.name>
@@ -51,7 +51,7 @@
     Utility.Exception
 
   if (! os(Windows))
-    Build-Depends: unix (>= 2.7.0 && < 2.8.0)
+    Build-Depends: unix (>= 2.7.0 && < 2.9.0)
 
 source-repository head
   type: git