diff --git a/shelly.cabal b/shelly.cabal
--- a/shelly.cabal
+++ b/shelly.cabal
@@ -1,6 +1,6 @@
 Name:       shelly
 
-Version:     0.15.3
+Version:     0.15.3.1
 Synopsis:    shell-like (systems) programming in Haskell
 
 Description: Shelly provides convenient systems programming in Haskell,
diff --git a/test/sleep.hs b/test/sleep.hs
--- a/test/sleep.hs
+++ b/test/sleep.hs
@@ -5,5 +5,5 @@
 main =
   shelly $ do
     echo "sleeping"
-    sleep 5
+    run "sleep" ["5"]
     echo "all done"