diff --git a/Project.toml b/Project.toml
index b86aa38..5e4ee29 100644
--- a/Project.toml
+++ b/Project.toml
@@ -16,7 +16,7 @@ AxisArrays = "0.4"
 AxisKeys = "0.2"
 DimensionalData = "0.27, 0.28, 0.29, 0.30"
 NetCDF = "0.11, 0.12"
-Zarr = "0.8, 0.9"
+Zarr = "0.10"
 
 
 [extensions]
diff --git a/ext/ZarrExt.jl b/ext/ZarrExt.jl
index c8a4438..b599233 100644
--- a/ext/ZarrExt.jl
+++ b/ext/ZarrExt.jl
@@ -1,6 +1,6 @@
 module ZarrExt
 using YAXArrayBase
-using Zarr: ZArray, ZGroup, zgroup, zcreate, to_zarrtype, zopen, Compressor, ZipStore
+using Zarr: ZArray, ZGroup, zgroup, zcreate, to_zarrtype, zopen, Compressor, ZipStore, NoCompressor, MetadataV2, MetadataV3
 import DiskArrays: AbstractDiskArray, DiskArrays, Unchunked, Chunked, GridChunks
 using ZipArchives: ZipReader
 import YAXArrayBase: YAXArrayBase as YAB
@@ -74,7 +74,9 @@ YAB.create_empty(::Type{ZarrDataset}, path, gatts=Dict()) = ZarrDataset(zgroup(p
 YAB.allow_parallel_write(::ZarrDataset) = true
 YAB.allow_missings(::ZarrDataset) = false
 YAB.to_dataset(g::ZGroup; kwargs...) = ZarrDataset(g; kwargs...)
-YAB.iscompressed(a::ZArray{<:Any,<:Any,<:Compressor}) = true
+YAB.iscompressed(a::ZArray) = _iscompressed(a.metadata)
+_iscompressed(m::MetadataV3) = !isempty(m.codec.byte_to_byte)
+_iscompressed(m::MetadataV2) = !isa(m.compressor, NoCompressor)
 
 
 #Add ability to read zipped zarrs