diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 0.4.18
+
+* Deprecate closeManager [#136](https://github.com/snoyberg/http-client/issues/136) [#137](https://github.com/snoyberg/http-client/issues/137)
+
 ## 0.4.17
 
 * Case insensitive proxy environment variables [#135](https://github.com/snoyberg/http-client/issues/135)
diff --git a/Network/HTTP/Client/Manager.hs b/Network/HTTP/Client/Manager.hs
--- a/Network/HTTP/Client/Manager.hs
+++ b/Network/HTTP/Client/Manager.hs
@@ -162,9 +162,8 @@
     | maxCount > currCount = (Cons x (currCount + 1) now l, Nothing)
     | otherwise = (l, Just x)
 
--- | Create a 'Manager'. You may manually call 'closeManager' to shut it down,
--- or allow the @Manager@ to be shut down automatically based on garbage
--- collection.
+-- | Create a 'Manager'. The @Manager@ will be shut down automatically via
+-- garbage collection.
 --
 -- Creating a new 'Manager' is a relatively expensive operation, you are
 -- advised to share a single 'Manager' between requests instead.
@@ -306,7 +305,8 @@
 --
 -- Since 0.1.0
 closeManager :: Manager -> IO ()
-closeManager = closeManager' . mConns
+closeManager _ = return ()
+{-# DEPRECATED closeManager "Manager will be closed for you automatically when no longer in use" #-}
 
 closeManager' :: I.IORef ConnsMap
               -> IO ()
@@ -320,7 +320,8 @@
 --
 -- Since 0.2.1
 withManager :: ManagerSettings -> (Manager -> IO a) -> IO a
-withManager settings = bracket (newManager settings) closeManager
+withManager settings f = newManager settings >>= f
+{-# DEPRECATED withManager "Use newManager instead" #-}
 
 safeConnClose :: Connection -> IO ()
 safeConnClose ci = connectionClose ci `catch` \(_ :: IOException) -> return ()
diff --git a/http-client.cabal b/http-client.cabal
--- a/http-client.cabal
+++ b/http-client.cabal
@@ -1,5 +1,5 @@
 name:                http-client
-version:             0.4.17
+version:             0.4.18
 synopsis:            An HTTP client engine, intended as a base layer for more user-friendly packages.
 description:         Hackage documentation generation is not reliable. For up to date documentation, please see: <http://www.stackage.org/package/http-client>.
 homepage:            https://github.com/snoyberg/http-client