diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,9 @@
 # Changelog for streamly-bytestring
 
+## 0.2.3 (Sep 2025)
+
+* Support streamly-core-0.3.0
+
 ## 0.2.2 (Jul 2024)
 
 * Fix a bug that uses an unpinned array in the foreign pointer
diff --git a/src/Streamly/External/ByteString.hs b/src/Streamly/External/ByteString.hs
--- a/src/Streamly/External/ByteString.hs
+++ b/src/Streamly/External/ByteString.hs
@@ -89,8 +89,12 @@
 {-# INLINE pinnedCreate #-}
 pinnedCreate :: MonadIO m => Fold m Word8 (Array Word8)
 
-#if MIN_VERSION_streamly_core(0,2,2)
+#if MIN_VERSION_streamly_core(0,3,0)
 ensurePinned = Array.pin
+pinnedCreateOf = Array.createOf'
+pinnedCreate = Array.create'
+#elif MIN_VERSION_streamly_core(0,2,2)
+ensurePinned = Array.pin
 pinnedCreateOf = Array.pinnedCreateOf
 pinnedCreate = Array.pinnedCreate
 #elif MIN_VERSION_streamly_core(0,2,0)
@@ -103,6 +107,12 @@
 pinnedCreate = Array.write
 #endif
 
+#if MIN_VERSION_streamly_core(0,3,0)
+#define CREATE_N Array.createOf
+#else
+#define CREATE_N Array.writeN
+#endif
+
 {-# INLINE mutableByteArrayContents# #-}
 mutableByteArrayContents# :: MutableByteArray# RealWorld -> Addr#
 mutableByteArrayContents# marr# = byteArrayContents# (unsafeCoerce# marr#)
@@ -129,7 +139,7 @@
 toArray (CONSTRUCTOR(fptr, off, len)) =
     unsafeInlineIO
         $ withForeignPtr (fptr WHEN_0_10_12(`plusForeignPtr` off))
-        $ Unfold.fold (Array.writeN len) generator
+        $ Unfold.fold (CREATE_N len) generator
 
     where
 
diff --git a/src/Streamly/External/ByteString/Lazy.hs b/src/Streamly/External/ByteString/Lazy.hs
--- a/src/Streamly/External/ByteString/Lazy.hs
+++ b/src/Streamly/External/ByteString/Lazy.hs
@@ -37,6 +37,12 @@
 
 import Prelude hiding (read)
 
+#if MIN_VERSION_streamly_core(0,3,0)
+#define UNFOLD_EACH Unfold.unfoldEach
+#else
+#define UNFOLD_EACH Unfold.many
+#endif
+
 -- | Unfold a lazy ByteString to a stream of 'Array' 'Words'.
 {-# INLINE  chunkReader #-}
 chunkReader :: Monad m => Unfold m ByteString (Array Word8)
@@ -49,7 +55,7 @@
 -- | Unfold a lazy ByteString to a stream of Word8
 {-# INLINE reader #-}
 reader :: Monad m => Unfold m ByteString Word8
-reader = Unfold.many Array.reader readChunks
+reader = UNFOLD_EACH Array.reader readChunks
 
 -- TODO: "toChunks" should be called "read" instead
 -- | Convert a lazy 'ByteString' to a serial stream of 'Array' 'Word8'.
diff --git a/streamly-bytestring.cabal b/streamly-bytestring.cabal
--- a/streamly-bytestring.cabal
+++ b/streamly-bytestring.cabal
@@ -1,6 +1,6 @@
 cabal-version:  1.12
 name:           streamly-bytestring
-version:        0.2.2
+version:        0.2.3
 synopsis:       Library for streamly and bytestring interoperation.
 description:    Please see the README on GitHub at <https://github.com/psibi/streamly-bytestring#readme>
 category:       Streamly, Stream, ByteString
@@ -48,7 +48,9 @@
                  || == 0.11.4.*
                  || == 0.11.5.*
                  || == 0.12.0.*
-    , streamly-core >= 0.1.0 && < 0.2.3
+                 || == 0.12.1.*
+                 || == 0.12.2.*
+    , streamly-core >= 0.1.0 && < 0.3.1
   default-language: Haskell2010
 
 test-suite sb-test