diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2a3f95c..109512f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-### next [????.??.??]
+### 0.6.6 [2024.03.19]
 * Support building with `template-haskell-2.22.*` (GHC 9.10).
 
 ### 0.6.5 [2023.08.06]
diff --git a/deriving-compat.cabal b/deriving-compat.cabal
index 23d814d..ca7bc19 100644
--- a/deriving-compat.cabal
+++ b/deriving-compat.cabal
@@ -1,5 +1,5 @@
 name:                deriving-compat
-version:             0.6.5
+version:             0.6.6
 synopsis:            Backports of GHC deriving extensions
 description:         @deriving-compat@ provides Template Haskell functions that
                      mimic @deriving@ extensions that were introduced or modified