diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,10 @@
 # ChangeLog for time-manager
 
+## 0.2.1
+
+* Export KilledByThreadManager exception
+  [#1016](https://github.com/yesodweb/wai/pull/1016)
+
 ## 0.2.0
 
 * Providing `System.ThreadManager`.
diff --git a/System/ThreadManager.hs b/System/ThreadManager.hs
--- a/System/ThreadManager.hs
+++ b/System/ThreadManager.hs
@@ -8,6 +8,7 @@
     ThreadManager,
     newThreadManager,
     stopAfter,
+    KilledByThreadManager(..),
 
     -- * Fork
     forkManaged,
diff --git a/time-manager.cabal b/time-manager.cabal
--- a/time-manager.cabal
+++ b/time-manager.cabal
@@ -1,5 +1,5 @@
 Name:                time-manager
-Version:             0.2.0
+Version:             0.2.1
 Synopsis:            Scalable timer
 License:             MIT
 License-file:        LICENSE