diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,10 @@
 # Changelog for unliftio
 
+## 0.2.13
+
+* Add `UnliftIO.STM.orElse`
+* Re-export all of `SeekMode`
+
 ## 0.2.12.1
 
 * Minor doc improvements
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,7 +1,6 @@
 # unliftio
 
-[![Travis Build Status](https://travis-ci.org/fpco/unliftio.svg?branch=master)](https://travis-ci.org/fpco/unliftio)
-[![AppVeyor Build status](https://ci.appveyor.com/api/projects/status/sprg5nlyh0codcpv?svg=true)](https://ci.appveyor.com/project/snoyberg/unliftio)
+[![Build Status](https://dev.azure.com/fpco/unliftio/_apis/build/status/fpco.unliftio?branchName=master)](https://dev.azure.com/fpco/unliftio/_build/latest?definitionId=3&branchName=master)
 
 
 Provides the core `MonadUnliftIO` typeclass, a number of common
diff --git a/src/UnliftIO/IO.hs b/src/UnliftIO/IO.hs
--- a/src/UnliftIO/IO.hs
+++ b/src/UnliftIO/IO.hs
@@ -18,7 +18,7 @@
   , hSetBuffering
   , hGetBuffering
   , hSeek
-  , IO.SeekMode
+  , IO.SeekMode (..)
   , hTell
   , hIsOpen
   , hIsClosed
diff --git a/src/UnliftIO/STM.hs b/src/UnliftIO/STM.hs
--- a/src/UnliftIO/STM.hs
+++ b/src/UnliftIO/STM.hs
@@ -8,6 +8,7 @@
   , atomically
   , retrySTM
   , checkSTM
+  , STM.orElse
 
     -- * TVar
   , STM.TVar
diff --git a/unliftio.cabal b/unliftio.cabal
--- a/unliftio.cabal
+++ b/unliftio.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 8b1984c98016e38f78537ddb97b34bf8d25ab93ad8a47c64ad675dc6f20f62c4
+-- hash: bc7612e266638a6d07a620579aafe7d2690c4bef6d120416a1a7a3fc8999b416
 
 name:           unliftio
-version:        0.2.12.1
+version:        0.2.13
 synopsis:       The MonadUnliftIO typeclass for unlifting monads to IO (batteries included)
 description:    Please see the documentation and README at <https://www.stackage.org/package/unliftio>
 category:       Control
@@ -49,7 +49,7 @@
   ghc-options: -fwarn-incomplete-uni-patterns
   build-depends:
       async >2.1.1
-    , base >=4.8 && <5
+    , base >=4.9 && <5
     , bytestring
     , deepseq
     , directory
@@ -101,7 +101,7 @@
   build-depends:
       QuickCheck
     , async >2.1.1
-    , base >=4.8 && <5
+    , base >=4.9 && <5
     , bytestring
     , containers
     , deepseq
@@ -131,7 +131,7 @@
   ghc-options: -O2 -threaded -rtsopts
   build-depends:
       async >2.1.1
-    , base >=4.8 && <5
+    , base >=4.9 && <5
     , bytestring
     , deepseq
     , directory