diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,11 @@
 # Change Log
 
+## WIP
+
+## [1.4.1.0] - 2020-05-04
+
+- GHC 8.10 compatibility
+
 ## [1.4.0.0] - 2019-09-12
 
 - Remove Generic instance, see
diff --git a/default.nix b/default.nix
--- a/default.nix
+++ b/default.nix
@@ -1,5 +1,5 @@
 { pkgs ? import <nixpkgs> {}
-, compiler ? "ghc864"
+, compiler ? "ghc882"
 , hoogle ? true
 }:
 
diff --git a/shell.nix b/shell.nix
--- a/shell.nix
+++ b/shell.nix
@@ -1,5 +1,5 @@
 { pkgs ? import <nixpkgs> {}
-, compiler ? "ghc864"
+, compiler ? "ghc882"
 , hoogle ? true
 }:
 
diff --git a/src/Data/Vector/Generic/Sized.hs b/src/Data/Vector/Generic/Sized.hs
--- a/src/Data/Vector/Generic/Sized.hs
+++ b/src/Data/Vector/Generic/Sized.hs
@@ -10,6 +10,7 @@
 {-# LANGUAGE PatternSynonyms #-}
 {-# LANGUAGE ViewPatterns #-}
 {-# LANGUAGE CPP #-}
+{-# LANGUAGE UndecidableInstances #-}
 
 #if MIN_VERSION_base(4,12,0)
 {-# LANGUAGE NoStarIsType #-}
diff --git a/vector-sized.cabal b/vector-sized.cabal
--- a/vector-sized.cabal
+++ b/vector-sized.cabal
@@ -1,13 +1,13 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.31.2.
+-- This file has been generated from package.yaml by hpack version 0.33.0.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: a6e3b4ce977d92b06ce23ff21c540ce53032a023b9b0f55abcbefbe0e68786ac
+-- hash: 556e7c11321b9c778c723cb20757a86fc9f11c06d89cc2af90365b2a0dce55c0
 
 name:           vector-sized
-version:        1.4.0.0
+version:        1.4.1.0
 synopsis:       Size tagged vectors
 description:    Please see README.md
 category:       Data