diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # accelerate-kullback-liebler
 
+## 0.1.2.1
+
+  * Work with `accelerate >= 1.3.0.0`
+
 ## 0.1.2.0
 
   * Add `f`-divergence, `alpha`-divergence, Hellinger distance
diff --git a/accelerate-kullback-liebler.cabal b/accelerate-kullback-liebler.cabal
--- a/accelerate-kullback-liebler.cabal
+++ b/accelerate-kullback-liebler.cabal
@@ -1,6 +1,6 @@
 cabal-version:   2.0
 name:            accelerate-kullback-liebler
-version:         0.1.2.0
+version:         0.1.2.1
 license:         BSD3
 license-file:    LICENSE
 copyright:       Copyright: (c) 2019-2020 Vanessa McHale
@@ -18,11 +18,6 @@
     type:     darcs
     location: https://hub.darcs.net/vmchale/accelerate-kullback-liebler
 
-flag development
-    description: Enable `-Werror`
-    default:     False
-    manual:      True
-
 flag gpu
     description: Enable GPU backend (only affects test/benchmark suite)
 
@@ -36,9 +31,6 @@
         base >=4.3 && <5,
         accelerate >=1.1.0.0
 
-    if flag(development)
-        ghc-options: -Werror
-
     if impl(ghc >=8.0)
         ghc-options:
             -Wincomplete-uni-patterns -Wincomplete-record-updates
@@ -55,11 +47,8 @@
     build-depends:
         base >=4.3 && <5,
         mwc-random-accelerate -any,
-        accelerate >=1.1.0.0,
-        accelerate-kullback-liebler >=0.1.1.0
-
-    if flag(development)
-        ghc-options: -Werror
+        accelerate >=1.2.0.0,
+        accelerate-kullback-liebler -any
 
     if impl(ghc >=8.0)
         ghc-options:
@@ -86,9 +75,6 @@
         accelerate-test -any,
         accelerate -any
 
-    if flag(development)
-        ghc-options: -Werror
-
     if flag(gpu)
         cpp-options:   -DACCELERATE_GPU
         build-depends: accelerate-llvm-ptx -any
@@ -122,9 +108,6 @@
     if flag(gpu)
         cpp-options:   -DACCELERATE_GPU
         build-depends: accelerate-llvm-ptx -any
-
-    if flag(development)
-        ghc-options: -Werror
 
     if impl(ghc >=8.0)
         ghc-options:
diff --git a/common/Data/Array/Accelerate/Test.hs b/common/Data/Array/Accelerate/Test.hs
--- a/common/Data/Array/Accelerate/Test.hs
+++ b/common/Data/Array/Accelerate/Test.hs
@@ -11,7 +11,7 @@
 import           Data.Array.Accelerate.System.Random.MWC (Variate, randomArray, uniformR)
 
 -- | Doesn't actually check the list has one element
-the :: A.Scalar e -> e
+the :: A.Elt e => A.Scalar e -> e
 the = head . A.toList
 
 -- | Make a distribution of a given size