diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,8 +5,15 @@
 The format is based on [Keep a Changelog][changelog], and this project adheres
 to the [Haskell Package Versioning Policy][pvp].
 
-## [0.4.0.0] - Unreleased
+## [0.6.0.0] - Unreleased
 
+## [0.5.0.0] - 2022-07-16
+
+- Update to `ki-unlifted` 1.0.0
+- Add `MonadUnliftIO` instance for `Actor` monad
+
+## [0.4.0.0] - 2021-05-19
+
 - Remove low-level `Process` API in favor of high-level `Server` API
 - Rename "process" to "actor" everywhere
 - Consolidate everything under `Drama` and `Drama.Internal` modules
@@ -102,7 +109,9 @@
 
 Initial release
 
-[0.4.0.0]: https://github.com/evanrelf/drama/compare/v0.3.0.0...HEAD
+[0.6.0.0]: https://github.com/evanrelf/drama/compare/v0.5.0.0...HEAD
+[0.5.0.0]: https://github.com/evanrelf/drama/releases/tag/v0.5.0.0
+[0.4.0.0]: https://github.com/evanrelf/drama/releases/tag/v0.4.0.0
 [0.3.0.0]: https://github.com/evanrelf/drama/releases/tag/v0.3.0.0
 [0.2.0.0]: https://github.com/evanrelf/drama/releases/tag/v0.2.0.0
 [0.1.0.3]: https://github.com/evanrelf/drama/releases/tag/v0.1.0.3
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2021, Evan Relf
+Copyright (c) 2022, Evan Relf
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/drama.cabal b/drama.cabal
--- a/drama.cabal
+++ b/drama.cabal
@@ -1,7 +1,7 @@
-cabal-version: 2.4
+cabal-version: 2.2
 
 name:        drama
-version:     0.4.0.0
+version:     0.5.0.0
 synopsis:    Actor library for Haskell
 description: Actor library for Haskell
 category:    Concurrency
@@ -9,8 +9,8 @@
 maintainer:  Evan Relf <evan@evanrelf.com>
 homepage:    https://github.com/evanrelf/drama
 license:     BSD-3-Clause
-copyright:   2021 Evan Relf
-tested-with: GHC == 8.6.5, GHC == 8.8.4, GHC == 8.10.3
+copyright:   2022 Evan Relf
+tested-with: GHC == 8.6, GHC == 8.8, GHC == 8.10, GHC == 9.0
 
 license-file: LICENSE
 extra-source-files:
@@ -44,30 +44,25 @@
     -with-rtsopts=-N
 
 
-common hie
-  if impl(ghc >= 8.8)
-    ghc-options:
-      -fwrite-ide-info
-      -hiedir=.hie
-
-
 library
-  import: common, hie
+  import: common
   hs-source-dirs: src
   build-depends:
-      ki           >= 0.2 && < 0.3
-    , transformers >= 0.5 && < 1.0
-    , unagi-chan   >= 0.4 && < 0.5
+    , ki-unlifted   >= 1.0 && < 2.0
+    , stm
+    , transformers
+    , unagi-chan    >= 0.4 && < 0.5
+    , unliftio-core
   exposed-modules:
-      Drama
-    , Drama.Internal
+    Drama
+    Drama.Internal
 
 
 executable example-shared-resource
-  import: common, executable, hie
+  import: common, executable
   main-is: examples/shared-resource.hs
 
 
 executable example-use
-  import: common, executable, hie
+  import: common, executable
   main-is: examples/use.hs
diff --git a/examples/use.hs b/examples/use.hs
--- a/examples/use.hs
+++ b/examples/use.hs
@@ -119,6 +119,3 @@
     , put = \s -> cast stateAddr (PutState s)
     , modify = \f -> cast stateAddr (ModifyState f)
     }
-
-
-{- HLINT ignore "Avoid lambda" -}
diff --git a/src/Drama.hs b/src/Drama.hs
--- a/src/Drama.hs
+++ b/src/Drama.hs
@@ -2,7 +2,7 @@
 -- Module:     Drama
 -- Stability:  experimental
 -- License:    BSD-3-Clause
--- Copyright:  © 2021 Evan Relf
+-- Copyright:  © 2022 Evan Relf
 -- Maintainer: evan@evanrelf.com
 --
 -- Actor library for Haskell
diff --git a/src/Drama/Internal.hs b/src/Drama/Internal.hs
--- a/src/Drama/Internal.hs
+++ b/src/Drama/Internal.hs
@@ -14,21 +14,23 @@
 -- Module:     Drama.Internal
 -- Stability:  experimental
 -- License:    BSD-3-Clause
--- Copyright:  © 2021 Evan Relf
+-- Copyright:  © 2022 Evan Relf
 -- Maintainer: evan@evanrelf.com
 
 module Drama.Internal where
 
 import Control.Applicative (Alternative)
 import Control.Concurrent (MVar, newEmptyMVar, putMVar, takeMVar)
-import Control.Monad (MonadPlus)
+import Control.Monad (MonadPlus, void)
 import Control.Monad.Fix (MonadFix)
 import Control.Monad.IO.Class (MonadIO (..))
+import Control.Monad.IO.Unlift (MonadUnliftIO)
 import Control.Monad.Trans.Reader (ReaderT (..), asks)
 import Data.Kind (Type)
 
 import qualified Control.Concurrent.Chan.Unagi as Unagi
-import qualified Ki
+import qualified Control.Concurrent.STM as STM
+import qualified Ki.Unlifted as Ki
 
 -- Support `MonadFail` on GHC 8.6.5
 #if MIN_VERSION_base(4,9,0)
@@ -48,6 +50,7 @@
     , Applicative
     , Monad
     , MonadIO
+    , MonadUnliftIO -- ^ @since 0.5.0.0
     , Alternative
     , MonadPlus
 #if MIN_VERSION_base(4,9,0)
@@ -144,7 +147,7 @@
   -> Actor _msg ()
 spawnImpl address mailbox actor = do
   scope <- Actor $ asks scope
-  liftIO $ Ki.fork_ scope $ runActorImpl address mailbox actor
+  void $ liftIO $ Ki.fork scope $ runActorImpl address mailbox actor
 
 
 -- | Block until all child actors have terminated.
@@ -153,7 +156,7 @@
 wait :: Actor msg ()
 wait = do
   scope <- Actor $ asks scope
-  liftIO $ Ki.wait scope
+  liftIO $ STM.atomically $ Ki.awaitAll scope
 
 
 -- | Return the current actor's address.