diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Revision history for mutable-fenwick
 
+## 0.1.1.0 -- 2025-05-28
+
+* Allow base versions up to 4.21
+* Fix compile issue with `array` since 0.5.8.0
+
 ## 0.1.0.0 -- 2025-04-07
 
 * First version. Released on an unsuspecting world.
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # mutable-fenwick
 
+![Hackage Version](https://img.shields.io/hackage/v/mutable-fenwick?color=blue)
+
 This package provides an implementation of mutable
 [Fenwick trees](https://en.wikipedia.org/wiki/Fenwick_tree) in Haskell.
 
diff --git a/mutable-fenwick.cabal b/mutable-fenwick.cabal
--- a/mutable-fenwick.cabal
+++ b/mutable-fenwick.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               mutable-fenwick
-version:            0.1.0.0
+version:            0.1.1.0
 
 synopsis: Mutable Fenwick trees
 description:
@@ -28,7 +28,7 @@
     README.md
     CHANGELOG.md
 
-tested-with: GHC == 9.2.8 || == 9.4.8
+tested-with: GHC == 9.2.8 || == 9.4.8 || == 9.12.2
 
 source-repository head
     type:     git
@@ -47,13 +47,12 @@
     -- other-modules:
 
     build-depends:
-        base                   >= 4.17.2 && < 4.18,
+        base                   >= 4.17.2 && < 4.22,
         array                  >= 0.5.4 && < 0.6,
         commutative-semigroups >= 0.2.0 && < 0.3,
         monoid-subclasses      >= 1.2.6 && < 1.3,
         vector                 >= 0.13.1 && < 0.14,
 
-
 test-suite test-fenwick
     type: exitcode-stdio-1.0
     hs-source-dirs: tests
@@ -65,4 +64,3 @@
         array,
         vector,
     main-is: FenwickTest.hs
-
diff --git a/src/Data/Fenwick/Array.hs b/src/Data/Fenwick/Array.hs
--- a/src/Data/Fenwick/Array.hs
+++ b/src/Data/Fenwick/Array.hs
@@ -21,11 +21,13 @@
   ) where
 
 import Data.Array.MArray
+  ( Ix, MArray(newArray), readArray, writeArray )
+import Data.Array.Base
+  ( MArray(unsafeRead, unsafeWrite) )
 import Control.Monad
 import Data.Bits
 import Data.Semigroup.Cancellative
 import Data.Monoid.Cancellative
-import Data.Array.Base
 
 -- | Fenwick tree datatype. @array@ must be a type such that @array 'Int' elem@ refers to a valid
 -- mutable array. Fenwick tree is assumed to be data structure over a 1-based array of size @n@.