diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+# 1.6.8.7
+
+* Relax unix-compat constraints
+
 # 1.6.8.6
 
 * Fix Build issue [#156](https://github.com/yesodweb/Shelly.hs/issues/156)
diff --git a/shelly.cabal b/shelly.cabal
--- a/shelly.cabal
+++ b/shelly.cabal
@@ -1,6 +1,6 @@
 Name:       shelly
 
-Version:     1.6.8.6
+Version:     1.6.8.7
 Synopsis:    shell-like (systems) programming in Haskell
 
 Description: Shelly provides convenient systems programming in Haskell,
@@ -52,7 +52,7 @@
     directory                 >= 1.1.0.0 && < 1.4.0.0,
     mtl                       >= 2,
     process                   >= 1.0,
-    unix-compat               < 0.5,
+    unix-compat               < 0.6,
     system-filepath           >= 0.4.7 && < 0.5,
     system-fileio             < 0.4,
     monad-control             >= 0.3.2 && < 1.1,
@@ -125,7 +125,7 @@
     containers                >= 0.5.0.0,
     directory                 >= 1.1.0.0 && < 1.4.0.0,
     process                   >= 1.1.0,
-    unix-compat               < 0.5,
+    unix-compat               < 0.6,
     system-filepath           >= 0.4.7 && < 0.5,
     system-fileio             < 0.4,
     time                      >= 1.3 && < 1.9,