diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
index 2838ad6..704d870 100644
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,5 +1,5 @@
-next [????.??.??]
------------------
+5.1.8 [2022.05.07]
+------------------
 * Generalize the `Monad` constraint in the type signatures for
   `hoistFreeT` in `Control.Monad.Trans.Free` and `Control.Monad.Trans.Free.Ap`
   to a `Functor` constraint.
diff --git a/free.cabal b/free.cabal
index d5cdf73..6c29f8f 100644
--- a/free.cabal
+++ b/free.cabal
@@ -1,6 +1,6 @@
 name:          free
 category:      Control, Monads
-version:       5.1.7
+version:       5.1.8
 license:       BSD3
 cabal-version: 1.18
 license-file:  LICENSE