diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,1 +1,1 @@
-# Unreleased
+# 0.9.0.0
diff --git a/zeugma.cabal b/zeugma.cabal
--- a/zeugma.cabal
+++ b/zeugma.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           zeugma
-version:        0.8.1.0
+version:        0.9.0.0
 synopsis:       Polysemy effects for testing
 description:    See https://hackage.haskell.org/package/zeugma/docs/Zeugma.html
 category:       Prelude
@@ -75,45 +75,18 @@
       UndecidableInstances
       UnicodeSyntax
       ViewPatterns
-      BangPatterns
-      BinaryLiterals
-      ConstraintKinds
-      DeriveDataTypeable
-      DeriveFoldable
-      DeriveFunctor
-      DeriveGeneric
-      DeriveLift
-      DeriveTraversable
-      DoAndIfThenElse
-      EmptyCase
-      EmptyDataDecls
-      ExistentialQuantification
-      FlexibleContexts
-      FlexibleInstances
-      GeneralizedNewtypeDeriving
-      InstanceSigs
-      KindSignatures
-      MultiParamTypeClasses
-      NamedFieldPuns
-      PatternGuards
-      PolyKinds
-      RankNTypes
-      ScopedTypeVariables
-      StandaloneDeriving
-      TupleSections
-      TypeApplications
-      TypeOperators
-      TypeSynonymInstances
+      OverloadedRecordDot
+      NoFieldSelectors
   ghc-options: -Wall -Widentities -Wincomplete-uni-patterns -Wmissing-deriving-strategies -Wredundant-constraints -Wunused-type-patterns -Wunused-packages
   build-depends:
       base ==4.*
-    , chronos
-    , hedgehog
-    , incipit ==0.8.0.0
+    , chronos ==1.1.*
+    , hedgehog >=1.1 && <1.3
+    , incipit ==0.9.0.0
     , polysemy ==1.9.*
     , polysemy-chronos ==0.6.*
-    , polysemy-test ==0.7.*
+    , polysemy-test >=0.7 && <0.9
     , tasty ==1.4.*
     , tasty-expected-failure ==0.12.*
     , tasty-hedgehog >=1.3 && <1.5
-  default-language: Haskell2010
+  default-language: GHC2021