diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Revision history for newtype-zoo
 
+
+## 1.2.1.0 -- 2020-11-30
+
+* Make ghc-8.10 compatible
+
 ## 1.2.0.0 -- 2019-09-27
 
 * Add `Available`
@@ -15,7 +20,6 @@
   [Proposed on reddit](https://www.reddit.com/r/haskell/comments/d6fiti/announcement_a_library_of_typical_newtype/f0sz4yv?utm_source=share&utm_medium=web2x) by user _Syrak_
 * Document comparison to the `tagged` library, it was pointed out by users _gelisam_ and _davidwsd_
   [on reddit](https://www.reddit.com/r/haskell/comments/d6fiti/announcement_a_library_of_typical_newtype/f0tdyns?utm_source=share&utm_medium=web2x).
-
 
 ## 1.0.0.1 -- 2019-09-19
 
diff --git a/newtype-zoo.cabal b/newtype-zoo.cabal
--- a/newtype-zoo.cabal
+++ b/newtype-zoo.cabal
@@ -13,7 +13,7 @@
 -- PVP summary:      +-+------- breaking API changes
 --                   | | +----- non-breaking API additions
 --                   | | | +--- code changes with no API change
-version:             1.2.0.0
+version:             1.2.1.0
 
 -- A short (one-line) description of the package.
 synopsis:            Newtype Wrapper Zoo
@@ -115,7 +115,7 @@
 
   -- Other library packages from which modules are imported.
   build-depends:
-      base ^>=4.12.0.0
+      base ==4.*
     , comonad
     , data-default
     , deepseq