diff --git a/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/IArray.hs b/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/IArray.hs
index b74d044..3cce405 100644
--- a/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/IArray.hs
+++ b/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/IArray.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeApplications    #-}
 {-# LANGUAGE TypeFamilies        #-}
diff --git a/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/Internal.hs b/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/Internal.hs
index 1894173..422dcb5 100644
--- a/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/Internal.hs
+++ b/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/Internal.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeApplications    #-}
 {-# LANGUAGE TypeFamilies        #-}
diff --git a/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/Unboxed.hs b/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/Unboxed.hs
index 501f7e8..8c1ccbf 100644
--- a/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/Unboxed.hs
+++ b/accelerate-io-array/src/Data/Array/Accelerate/IO/Data/Array/Unboxed.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE FlexibleContexts    #-}
 {-# LANGUAGE MagicHash           #-}
+{-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeApplications    #-}
 {-# LANGUAGE TypeFamilies        #-}
diff --git a/accelerate-io-vector/src/Data/Array/Accelerate/IO/Data/Vector/Primitive.hs b/accelerate-io-vector/src/Data/Array/Accelerate/IO/Data/Vector/Primitive.hs
index 104641b..dd6b3fc 100644
--- a/accelerate-io-vector/src/Data/Array/Accelerate/IO/Data/Vector/Primitive.hs
+++ b/accelerate-io-vector/src/Data/Array/Accelerate/IO/Data/Vector/Primitive.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE BangPatterns        #-}
 {-# LANGUAGE GADTs               #-}
+{-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeApplications    #-}
 {-# LANGUAGE TypeFamilies        #-}
diff --git a/accelerate-io-vector/src/Data/Array/Accelerate/IO/Data/Vector/Storable.hs b/accelerate-io-vector/src/Data/Array/Accelerate/IO/Data/Vector/Storable.hs
index cdee459..3d97844 100644
--- a/accelerate-io-vector/src/Data/Array/Accelerate/IO/Data/Vector/Storable.hs
+++ b/accelerate-io-vector/src/Data/Array/Accelerate/IO/Data/Vector/Storable.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE BangPatterns        #-}
 {-# LANGUAGE GADTs               #-}
+{-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeApplications    #-}
 {-# LANGUAGE TypeFamilies        #-}
diff --git a/stack-8.10.yaml b/stack-8.10.yaml
index 169d9d0..1f5647b 100644
--- a/stack-8.10.yaml
+++ b/stack-8.10.yaml
@@ -2,7 +2,7 @@
 # For advanced use and comprehensive documentation of the format, please see:
 # https://docs.haskellstack.org/en/stable/yaml_configuration/
 
-resolver: nightly-2020-08-26
+resolver: lts-18.8
 
 packages:
 - accelerate-io
@@ -16,7 +16,9 @@ packages:
 - accelerate-io-vector
 
 extra-deps:
-- accelerate-1.3.0.0
+- github: tmcdonell/accelerate
+  commit: 7c769b761d0b2a91f318096b9dd3fced94616961
+
 - repa-3.4.1.4
 
 # Override default flag values for local packages and extra-deps
diff --git a/stack-8.8.yaml b/stack-8.8.yaml
index 40ed98c..6d15f3c 100644
--- a/stack-8.8.yaml
+++ b/stack-8.8.yaml
@@ -1,7 +1,7 @@
 # For more information, see: https://github.com/commercialhaskell/stack/blob/release/doc/yaml_configuration.md
 # vim: nospell
 
-resolver: lts-16.11
+resolver: lts-16.31
 
 packages:
 - accelerate-io