diff --git a/CHANGELOG.rst b/CHANGELOG.rst
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -6,6 +6,20 @@
 
 .. _PVP: https://pvp.haskell.org/
 
+
+1.8.0.0 (2018-06-03)
+--------------------
+
+* Git: :tag:`dejafu-1.8.0.0`
+* Hackage: :hackage:`dejafu-1.8.0.0`
+
+Changed
+~~~~~~~
+
+* (:issue:`258`) Length bounding is disabled by default.  This is not
+  a breaking API change, but it is a breaking semantics change.
+
+
 1.7.0.0 (2018-06-03)
 --------------------
 
diff --git a/Test/DejaFu/Settings.hs b/Test/DejaFu/Settings.hs
--- a/Test/DejaFu/Settings.hs
+++ b/Test/DejaFu/Settings.hs
@@ -309,12 +309,15 @@
 
 -- | All bounds enabled, using their default values.
 --
--- @since 0.2.0.0
+-- There is no default length bound, so set one if your computation
+-- may not terminate!
+--
+-- @since 1.8.0.0
 defaultBounds :: Bounds
 defaultBounds = Bounds
   { boundPreemp = Just defaultPreemptionBound
   , boundFair   = Just defaultFairBound
-  , boundLength = Just defaultLengthBound
+  , boundLength = Nothing
   }
 
 -- | A sensible default preemption bound: 2.
@@ -335,12 +338,11 @@
 defaultFairBound :: FairBound
 defaultFairBound = 5
 
--- | A sensible default length bound: 250.
+-- | There is no default length bound.
 --
--- Based on the assumption that anything which executes for much
--- longer (or even this long) will take ages to test.
+-- This is only suitable if your computation will always terminate!
 --
--- @since 0.2.0.0
+-- @since 1.8.0.0
 defaultLengthBound :: LengthBound
 defaultLengthBound = 250
 
diff --git a/dejafu.cabal b/dejafu.cabal
--- a/dejafu.cabal
+++ b/dejafu.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                dejafu
-version:             1.7.0.0
+version:             1.8.0.0
 synopsis:            A library for unit-testing concurrent programs.
 
 description:
@@ -33,7 +33,7 @@
 source-repository this
   type:     git
   location: https://github.com/barrucadu/dejafu.git
-  tag:      dejafu-1.7.0.0
+  tag:      dejafu-1.8.0.0
 
 library
   exposed-modules:     Test.DejaFu