diff --git a/CHANGELOG.md b/CHANGELOG.md
index 080a6722..bb851450 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+ - Fixed build with `bitround` or `zfp` features without `async` feature
+
 ## [0.11.0] - 2024-01-26
 
 ### Highlights
diff --git a/Cargo.toml b/Cargo.toml
index 319142d0..ff8e6c97 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zarrs"
-version = "0.11.0"
+version = "0.11.1"
 authors = ["Lachlan Deakin <ljdgit@gmail.com>"]
 edition = "2021"
 rust-version = "1.71"
diff --git a/src/array/codec.rs b/src/array/codec.rs
index 79c27c82..3021cd43 100644
--- a/src/array/codec.rs
+++ b/src/array/codec.rs
@@ -309,7 +309,7 @@ pub trait BytesPartialDecoderTraits: Send + Sync {
 
 #[cfg(feature = "async")]
 /// Asynchronous partial bytes decoder traits.
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 pub trait AsyncBytesPartialDecoderTraits: Send + Sync {
     /// Partially decode bytes with optional parallelism.
     ///
@@ -424,7 +424,7 @@ pub trait ArrayPartialDecoderTraits: Send + Sync {
 
 #[cfg(feature = "async")]
 /// Asynchronous partial array decoder traits.
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 pub trait AsyncArrayPartialDecoderTraits: Send + Sync {
     /// Partially decode an array.
     ///
@@ -507,7 +507,7 @@ impl<'a> AsyncStoragePartialDecoder<'a> {
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl AsyncBytesPartialDecoderTraits for AsyncStoragePartialDecoder<'_> {
     async fn partial_decode_opt(
         &self,
diff --git a/src/array/codec/array_to_array/bitround/bitround_codec.rs b/src/array/codec/array_to_array/bitround/bitround_codec.rs
index ac2c1972..057b0f03 100644
--- a/src/array/codec/array_to_array/bitround/bitround_codec.rs
+++ b/src/array/codec/array_to_array/bitround/bitround_codec.rs
@@ -1,14 +1,17 @@
 use crate::{
     array::{
         codec::{
-            ArrayCodecTraits, ArrayPartialDecoderTraits, ArrayToArrayCodecTraits,
-            AsyncArrayPartialDecoderTraits, CodecError, CodecTraits,
+            ArrayCodecTraits, ArrayPartialDecoderTraits, ArrayToArrayCodecTraits, CodecError,
+            CodecTraits,
         },
         ChunkRepresentation, DataType,
     },
     metadata::Metadata,
 };
 
+#[cfg(feature = "async")]
+use crate::array::codec::AsyncArrayPartialDecoderTraits;
+
 use super::{bitround_partial_decoder, round_bytes, BitroundCodecConfiguration, IDENTIFIER};
 
 /// A `bitround` codec implementation.
@@ -98,6 +101,7 @@ impl ArrayToArrayCodecTraits for BitroundCodec {
         ))
     }
 
+    #[cfg(feature = "async")]
     async fn async_partial_decoder_opt<'a>(
         &'a self,
         input_handle: Box<dyn AsyncArrayPartialDecoderTraits + 'a>,
diff --git a/src/array/codec/array_to_array/bitround/bitround_partial_decoder.rs b/src/array/codec/array_to_array/bitround/bitround_partial_decoder.rs
index 70a02ba7..c07fa290 100644
--- a/src/array/codec/array_to_array/bitround/bitround_partial_decoder.rs
+++ b/src/array/codec/array_to_array/bitround/bitround_partial_decoder.rs
@@ -1,11 +1,14 @@
 use crate::{
     array::{
-        codec::{ArrayPartialDecoderTraits, AsyncArrayPartialDecoderTraits, CodecError},
+        codec::{ArrayPartialDecoderTraits, CodecError},
         DataType,
     },
     array_subset::ArraySubset,
 };
 
+#[cfg(feature = "async")]
+use crate::array::codec::AsyncArrayPartialDecoderTraits;
+
 use super::{round_bytes, IDENTIFIER};
 
 /// Partial decoder for the `bitround` codec.
@@ -65,6 +68,7 @@ impl ArrayPartialDecoderTraits for BitroundPartialDecoder<'_> {
     }
 }
 
+#[cfg(feature = "async")]
 /// Asynchronous partial decoder for the `bitround` codec.
 pub struct AsyncBitroundPartialDecoder<'a> {
     input_handle: Box<dyn AsyncArrayPartialDecoderTraits + 'a>,
@@ -72,6 +76,7 @@ pub struct AsyncBitroundPartialDecoder<'a> {
     keepbits: u32,
 }
 
+#[cfg(feature = "async")]
 impl<'a> AsyncBitroundPartialDecoder<'a> {
     /// Create a new partial decoder for the `bitround` codec.
     pub fn new(
@@ -104,7 +109,8 @@ impl<'a> AsyncBitroundPartialDecoder<'a> {
     }
 }
 
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[cfg(feature = "async")]
+#[async_trait::async_trait]
 impl AsyncArrayPartialDecoderTraits for AsyncBitroundPartialDecoder<'_> {
     async fn partial_decode_opt(
         &self,
diff --git a/src/array/codec/array_to_bytes/bytes/bytes_partial_decoder.rs b/src/array/codec/array_to_bytes/bytes/bytes_partial_decoder.rs
index 2d811a97..ac93fbd0 100644
--- a/src/array/codec/array_to_bytes/bytes/bytes_partial_decoder.rs
+++ b/src/array/codec/array_to_bytes/bytes/bytes_partial_decoder.rs
@@ -105,7 +105,7 @@ impl<'a> AsyncBytesPartialDecoder<'a> {
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl AsyncArrayPartialDecoderTraits for AsyncBytesPartialDecoder<'_> {
     async fn partial_decode_opt(
         &self,
diff --git a/src/array/codec/array_to_bytes/zfp/zfp_codec.rs b/src/array/codec/array_to_bytes/zfp/zfp_codec.rs
index a047eae7..de222a2d 100644
--- a/src/array/codec/array_to_bytes/zfp/zfp_codec.rs
+++ b/src/array/codec/array_to_bytes/zfp/zfp_codec.rs
@@ -7,7 +7,6 @@ use crate::{
     array::{
         codec::{
             ArrayCodecTraits, ArrayPartialDecoderTraits, ArrayToBytesCodecTraits,
-            AsyncArrayPartialDecoderTraits, AsyncBytesPartialDecoderTraits,
             BytesPartialDecoderTraits, Codec, CodecError, CodecPlugin, CodecTraits,
         },
         BytesRepresentation, ChunkRepresentation, DataType,
@@ -16,6 +15,9 @@ use crate::{
     plugin::{PluginCreateError, PluginMetadataInvalidError},
 };
 
+#[cfg(feature = "async")]
+use crate::array::codec::{AsyncArrayPartialDecoderTraits, AsyncBytesPartialDecoderTraits};
+
 use super::{
     zarr_data_type_to_zfp_data_type,
     zfp_bitstream::ZfpBitstream,
@@ -233,6 +235,7 @@ impl ArrayToBytesCodecTraits for ZfpCodec {
         )?))
     }
 
+    #[cfg(feature = "async")]
     async fn async_partial_decoder_opt<'a>(
         &'a self,
         input_handle: Box<dyn AsyncBytesPartialDecoderTraits + 'a>,
diff --git a/src/array/codec/array_to_bytes/zfp/zfp_partial_decoder.rs b/src/array/codec/array_to_bytes/zfp/zfp_partial_decoder.rs
index 09df457a..7d0028f2 100644
--- a/src/array/codec/array_to_bytes/zfp/zfp_partial_decoder.rs
+++ b/src/array/codec/array_to_bytes/zfp/zfp_partial_decoder.rs
@@ -3,16 +3,16 @@ use zfp_sys::zfp_type;
 use crate::{
     array::{
         chunk_shape_to_array_shape,
-        codec::{
-            ArrayPartialDecoderTraits, AsyncArrayPartialDecoderTraits,
-            AsyncBytesPartialDecoderTraits, BytesPartialDecoderTraits, CodecError,
-        },
+        codec::{ArrayPartialDecoderTraits, BytesPartialDecoderTraits, CodecError},
         ChunkRepresentation,
     },
     array_subset::ArraySubset,
     byte_range::extract_byte_ranges,
 };
 
+#[cfg(feature = "async")]
+use crate::array::codec::{AsyncArrayPartialDecoderTraits, AsyncBytesPartialDecoderTraits};
+
 use super::{zarr_data_type_to_zfp_data_type, zfp_decode, ZfpMode};
 
 /// Partial decoder for the `zfp` codec.
@@ -92,6 +92,7 @@ impl ArrayPartialDecoderTraits for ZfpPartialDecoder<'_> {
     }
 }
 
+#[cfg(feature = "async")]
 /// Asynchronous partial decoder for the `zfp` codec.
 pub struct AsyncZfpPartialDecoder<'a> {
     input_handle: Box<dyn AsyncBytesPartialDecoderTraits + 'a>,
@@ -100,6 +101,7 @@ pub struct AsyncZfpPartialDecoder<'a> {
     zfp_type: zfp_type,
 }
 
+#[cfg(feature = "async")]
 impl<'a> AsyncZfpPartialDecoder<'a> {
     /// Create a new partial decoder for the `zfp` codec.
     pub fn new(
@@ -125,7 +127,8 @@ impl<'a> AsyncZfpPartialDecoder<'a> {
     }
 }
 
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[cfg(feature = "async")]
+#[async_trait::async_trait]
 impl AsyncArrayPartialDecoderTraits for AsyncZfpPartialDecoder<'_> {
     async fn partial_decode_opt(
         &self,
diff --git a/src/array/codec/byte_interval_partial_decoder.rs b/src/array/codec/byte_interval_partial_decoder.rs
index 3ace1310..4d9d07e1 100644
--- a/src/array/codec/byte_interval_partial_decoder.rs
+++ b/src/array/codec/byte_interval_partial_decoder.rs
@@ -84,7 +84,7 @@ impl<'a> AsyncByteIntervalPartialDecoder<'a> {
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<'a> AsyncBytesPartialDecoderTraits for AsyncByteIntervalPartialDecoder<'a> {
     async fn partial_decode_opt(
         &self,
diff --git a/src/array/codec/partial_decoder_cache.rs b/src/array/codec/partial_decoder_cache.rs
index be6f3bd2..6a40ac2e 100644
--- a/src/array/codec/partial_decoder_cache.rs
+++ b/src/array/codec/partial_decoder_cache.rs
@@ -74,7 +74,7 @@ impl BytesPartialDecoderTraits for BytesPartialDecoderCache<'_> {
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl AsyncBytesPartialDecoderTraits for BytesPartialDecoderCache<'_> {
     async fn partial_decode_opt(
         &self,
@@ -165,7 +165,7 @@ impl<'a> ArrayPartialDecoderTraits for ArrayPartialDecoderCache<'a> {
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<'a> AsyncArrayPartialDecoderTraits for ArrayPartialDecoderCache<'a> {
     async fn partial_decode_opt(
         &self,
diff --git a/src/storage/storage_handle.rs b/src/storage/storage_handle.rs
index e20e78c6..dc4a928d 100644
--- a/src/storage/storage_handle.rs
+++ b/src/storage/storage_handle.rs
@@ -117,7 +117,7 @@ impl<TStorage: ?Sized + ReadableWritableStorageTraits> ReadableWritableStorageTr
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncReadableStorageTraits> AsyncReadableStorageTraits
     for StorageHandle<'_, TStorage>
 {
@@ -154,7 +154,7 @@ impl<TStorage: ?Sized + AsyncReadableStorageTraits> AsyncReadableStorageTraits
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncListableStorageTraits> AsyncListableStorageTraits
     for StorageHandle<'_, TStorage>
 {
@@ -178,7 +178,7 @@ impl<TStorage: ?Sized + AsyncListableStorageTraits> AsyncListableStorageTraits
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncWritableStorageTraits> AsyncWritableStorageTraits
     for StorageHandle<'_, TStorage>
 {
@@ -207,7 +207,7 @@ impl<TStorage: ?Sized + AsyncWritableStorageTraits> AsyncWritableStorageTraits
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncReadableWritableStorageTraits> AsyncReadableWritableStorageTraits
     for StorageHandle<'_, TStorage>
 {
diff --git a/src/storage/storage_transformer/performance_metrics.rs b/src/storage/storage_transformer/performance_metrics.rs
index 7866e25e..458d7b5d 100644
--- a/src/storage/storage_transformer/performance_metrics.rs
+++ b/src/storage/storage_transformer/performance_metrics.rs
@@ -296,7 +296,7 @@ impl<TStorage: ?Sized + ReadableWritableStorageTraits> ReadableWritableStorageTr
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncReadableStorageTraits> AsyncReadableStorageTraits
     for PerformanceMetricsStorageTransformerImpl<'_, TStorage>
 {
@@ -365,7 +365,7 @@ impl<TStorage: ?Sized + AsyncReadableStorageTraits> AsyncReadableStorageTraits
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncListableStorageTraits> AsyncListableStorageTraits
     for PerformanceMetricsStorageTransformerImpl<'_, TStorage>
 {
@@ -383,7 +383,7 @@ impl<TStorage: ?Sized + AsyncListableStorageTraits> AsyncListableStorageTraits
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncWritableStorageTraits> AsyncWritableStorageTraits
     for PerformanceMetricsStorageTransformerImpl<'_, TStorage>
 {
@@ -426,7 +426,7 @@ impl<TStorage: ?Sized + AsyncWritableStorageTraits> AsyncWritableStorageTraits
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncReadableWritableStorageTraits> AsyncReadableWritableStorageTraits
     for PerformanceMetricsStorageTransformerImpl<'_, TStorage>
 {
diff --git a/src/storage/storage_transformer/usage_log.rs b/src/storage/storage_transformer/usage_log.rs
index b60313c0..76f75835 100644
--- a/src/storage/storage_transformer/usage_log.rs
+++ b/src/storage/storage_transformer/usage_log.rs
@@ -375,7 +375,7 @@ impl<TStorage: ?Sized + ReadableWritableStorageTraits> ReadableWritableStorageTr
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncReadableStorageTraits> AsyncReadableStorageTraits
     for UsageLogStorageTransformerImpl<TStorage>
 {
@@ -461,7 +461,7 @@ impl<TStorage: ?Sized + AsyncReadableStorageTraits> AsyncReadableStorageTraits
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncListableStorageTraits> AsyncListableStorageTraits
     for UsageLogStorageTransformerImpl<TStorage>
 {
@@ -509,7 +509,7 @@ impl<TStorage: ?Sized + AsyncListableStorageTraits> AsyncListableStorageTraits
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncWritableStorageTraits> AsyncWritableStorageTraits
     for UsageLogStorageTransformerImpl<TStorage>
 {
@@ -570,7 +570,7 @@ impl<TStorage: ?Sized + AsyncWritableStorageTraits> AsyncWritableStorageTraits
 }
 
 #[cfg(feature = "async")]
-#[cfg_attr(feature = "async", async_trait::async_trait)]
+#[async_trait::async_trait]
 impl<TStorage: ?Sized + AsyncReadableWritableStorageTraits> AsyncReadableWritableStorageTraits
     for UsageLogStorageTransformerImpl<TStorage>
 {