diff --git a/Project.toml b/Project.toml
index 857afe7..0ca1e60 100644
--- a/Project.toml
+++ b/Project.toml
@@ -5,6 +5,7 @@ version = "2.2.0"
 
 [deps]
 ArgCheck = "dce04be8-c92d-5529-be00-80e4d2c0e197"
+CodecInflate64 = "6309b1aa-fc58-479c-8956-599a07234577"
 CodecZlib = "944b1d66-785c-5afd-91f1-9de20f533193"
 InputBuffers = "0c81fc1b-5583-44fc-8770-48be1e1cca08"
 PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
@@ -13,6 +14,7 @@ Zlib_jll = "83775a58-1f1d-513f-b197-d71354ab007a"
 
 [compat]
 ArgCheck = "2"
+CodecInflate64 = "0.1"
 CodecZlib = "0.7"
 InputBuffers = "1"
 PrecompileTools = "1"
diff --git a/README.md b/README.md
index 238dfc6..e907db2 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,8 @@ The central directory makes it fast to read just one random entry out of a very
 
 When writing it is important to close the writer so the central directory gets written out.
 
+More details on the file format can be found at https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT
+
 ### Reading Zip archives
 
 Archives can be read from any `AbstractVector{UInt8}` containing the data of a zip archive.
@@ -85,6 +87,13 @@ ZipWriter(filename) do w
 end
 ```
 
+### Supported Compression Methods
+
+| Compression Method | Reading | Writing |
+|--------------------|---------|---------|
+| 0 - Store (none)   | Yes     | Yes     |
+| 8 - Deflate        | Yes     | Yes     |
+| 9 - Deflate64      | Yes     | No      |
 
 ### Limitations
 
@@ -92,7 +101,6 @@ end
 1. Ignores time stamps.
 1. Cannot write an archive fully in streaming mode. See https://github.com/madler/zipflow if you need this functionality.
 1. Encryption and decryption not supported.
-1. Only deflated and uncompressed data are supported. There is no support for bzip2 or zstd.
 1. Multi disk archives not supported.
 1. Cannot recover data from a corrupted archive. Especially if the end of the archive is corrupted.
 
diff --git a/src/ZipArchives.jl b/src/ZipArchives.jl
index c967b32..11fb866 100644
--- a/src/ZipArchives.jl
+++ b/src/ZipArchives.jl
@@ -47,6 +47,7 @@ end
 module ZipArchives
 
 using CodecZlib: DeflateCompressorStream, DeflateDecompressorStream, DeflateCompressor
+using CodecInflate64: Deflate64DecompressorStream
 using TranscodingStreams: TranscodingStreams, TranscodingStream, Noop, NoopStream
 using ArgCheck: @argcheck
 using Zlib_jll: Zlib_jll
diff --git a/src/constants.jl b/src/constants.jl
index 8d183be..3091924 100644
--- a/src/constants.jl
+++ b/src/constants.jl
@@ -4,6 +4,9 @@ const Store = UInt16(0)
 "Deflate compression method"
 const Deflate = UInt16(8)
 
+"Deflate64 compression method"
+const Deflate64 = UInt16(9)
+
 #=
 see https://github.com/madler/zipflow/blob/2bef2123ebe519c17b18d2d0c3c71065088de952/zipflow.c#L214
 =#
diff --git a/src/reader.jl b/src/reader.jl
index b134ccc..25ec83f 100644
--- a/src/reader.jl
+++ b/src/reader.jl
@@ -104,7 +104,7 @@ Return the compression method used for entry `i`.
 
 See https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT for a current list of methods.
 
-Only Store(0x0000) and Deflate(0x0008) supported for now.
+Only Store(0), Deflate(8), and Deflate64(9) are supported for now.
 
 Note: if the zip file was corrupted, this might be wrong.
 """
@@ -774,8 +774,8 @@ end
 function zip_openentry(r::ZipReader, i::Int)
     compressed_size::Int64 = zip_compressed_size(r, i)
     method = zip_compression_method(r, i)
-    if method != Store && method != Deflate
-        throw(ArgumentError("invalid compression method: $(method). Only Store(0) and Deflate(8) supported for now"))
+    if method != Store && method != Deflate && method != Deflate64
+        throw(ArgumentError("invalid compression method: $(method). Only Store(0), Deflate(8), and Deflate64(9) supported for now"))
     end
     entry_data_offset = zip_entry_data_offset(r, i)
 
@@ -792,6 +792,8 @@ function zip_openentry(r::ZipReader, i::Int)
         return base_io
     elseif method == Deflate
         return DeflateDecompressorStream(base_io)
+    elseif method == Deflate64
+        return Deflate64DecompressorStream(base_io)
     else
         # should throw and ArgumentError before this
         error("unreachable") 
diff --git a/test/Artifacts.toml b/test/Artifacts.toml
index 85fedc7..5ea48dc 100644
--- a/test/Artifacts.toml
+++ b/test/Artifacts.toml
@@ -1,6 +1,6 @@
 [fixture]
-git-tree-sha1 = "6ab9957b72056a0c388b056305a24d9742cfb840"
+git-tree-sha1 = "ed34b433321060f64bbdbda044851336788b9af6"
 
     [[fixture.download]]
-    url = "https://github.com/JuliaIO/ZipArchives.jl/releases/download/v0.2.1/fixture.tar.gz"
-    sha256 = "a0505b18c35455b7163060355401ed722b9fdcd177bf2f93ab5e696f758d9507"
+    sha256 = "99a9bb1d9cba1fae77fd7be224b654da1f247815845ef4ac682a546e8dc70ceb"
+    url = "https://github.com/JuliaIO/ZipArchives.jl/releases/download/v2.1.6/fixture.tar.gz"
diff --git a/test/Fixture-README.md b/test/Fixture-README.md
index 545b2d6..b3c5223 100644
--- a/test/Fixture-README.md
+++ b/test/Fixture-README.md
@@ -16,7 +16,7 @@ Add the file to the "fixture" directory, and a description to this file.
 Then run
 ```julia
 # This is the url that the artifact will be available from:
-url_to_upload_to = "https://github.com/medyan-dev/ZipArchives.jl/releases/download/v0.2.1/fixture.tar.gz"
+url_to_upload_to = "https://github.com/medyan-dev/ZipArchives.jl/releases/download/v2.1.6/fixture.tar.gz"
 # This is the path to the Artifacts.toml we will manipulate
 artifact_toml = "Artifacts.toml"
 fixture_hash = create_artifact() do artifact_dir
@@ -30,14 +30,36 @@ bind_artifact!(artifact_toml, "fixture", fixture_hash; force=true,
 
 Finally, upload the new "fixture.tar.gz" to `url_to_upload_to`
 
-## `win11-excel.xlsx`
-Small excel file created on windows 11 in microsoft Excel version 2305.
+## `dotnet-deflate64.zip`
+This file is downloaded from https://github.com/dotnet/runtime-assets/blob/95277f38e68b66f1b48600d90d456c32c9ae0fa2/src/System.IO.Compression.TestData/ZipTestData/compat/deflate64.zip
+
+## `leftpad-core_2.13-0.1.11.jar`
+Example jar file from https://mvnrepository.com/artifact/io.github.asakaev/leftpad-core_2.13/0.1.11
+
+## `ubuntu22-7zip.zip`
+Created with 7zip version 22.01 (x64)
+
+## `ubuntu22-files.zip`
+Created with default ubuntu files program
+
+## `ubuntu22-infozip.zip`
+Small zip file created with ubuntu22 Info-ZIP Zip 3.0
+
+## `ubuntu22-old7zip.zip`
+Created with 7zip version 16.02 p7zip 16.02
+
+## `win11-7zip.zip`
+Small zip file created with windows 11 7Zip 22.01
+
+## `win11-deflate64.zip`
+Large zip file created with windows 11 file explorer.
+Designed to test the deflate64 decompressor.
 
 ## `win11-excel.ods`
 Small OpenDocument Spreadsheet file created on windows 11 in microsoft Excel version 2305.
 
-## `win11-libreoffice.ods`
-Small OpenDocument Spreadsheet file created on windows 11 in LibreOffice Calc 7.5
+## `win11-excel.xlsx`
+Small excel file created on windows 11 in microsoft Excel version 2305.
 
 ## `win11-explorer.zip`
 Small zip file created with windows 11 file explorer
@@ -45,12 +67,12 @@ Small zip file created with windows 11 file explorer
 ## `win11-infozip.zip`
 Small zip file created with windows 11 Info-ZIP Zip 3.0
 
-## `win11-7zip.zip`
-Small zip file created with windows 11 7Zip 22.01
-
 ## `win11-julia-p7zip.zip`
 Small zip file created with windows 11 p7zip_jll 17.4.0+0
 
+## `win11-libreoffice.ods`
+Small OpenDocument Spreadsheet file created on windows 11 in LibreOffice Calc 7.5
+
 ## `win11-powerpoint.odp`
 Small odp file created on windows 11 in microsoft PowerPoint version 2305
 
@@ -60,17 +82,5 @@ Small pptx file created on windows 11 in microsoft PowerPoint version 2305
 ## `ZipArchives.jl-main.zip`
 Zip file downloaded from a github on 20 JUN 2023
 
-## `leftpad-core_2.13-0.1.11.jar`
-Example jar file from https://mvnrepository.com/artifact/io.github.asakaev/leftpad-core_2.13/0.1.11
-
-## `ubuntu22-files.zip`
-Created with default ubuntu files program
-
-## `ubuntu22-7zip.zip`
-Created with 7zip version 22.01 (x64)
-
-## `ubuntu22-old7zip.zip`
-Created with 7zip version 16.02 p7zip 16.02
-
-## `ubuntu22-infozip.zip`
-Small zip file created with ubuntu22 Info-ZIP Zip 3.0
\ No newline at end of file
+## `zipfile-deflate64.zip`
+Test file from https://github.com/brianhelba/zipfile-deflate64/blob/beec33184da6da4697a1994c0ac4c64cef8cff50/tests/data/deflate64.zip
\ No newline at end of file
diff --git a/test/Project.toml b/test/Project.toml
index 0759be7..9c9a47b 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -9,6 +9,7 @@ OffsetArrays = "6fe1bfb0-de20-5000-8ca7-80f57d26f881"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 PythonCall = "6099a3de-0909-46bc-b1f4-468b9a2dfc0d"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+SHA = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 Setfield = "efcf1570-3423-57d1-acb7-fd33fddbac46"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 TranscodingStreams = "3bb67fe8-82b1-5028-8e26-92a6c54297fa"
diff --git a/test/test_reader.jl b/test/test_reader.jl
index 197a16a..2e4d678 100644
--- a/test/test_reader.jl
+++ b/test/test_reader.jl
@@ -4,6 +4,7 @@ using Base64: base64decode
 using Setfield: @set
 using p7zip_jll: p7zip_jll
 using OffsetArrays: Origin
+using SHA: sha256
 
 @testset "find_end_of_central_directory_record unit tests" begin
     find_eocd = ZipArchives.find_end_of_central_directory_record
@@ -149,8 +150,8 @@ end
     data_b64 = "UEsDBD8AAgAOAHJb0FaLksVmIgAAABAAAAAJAAAAbHptYV9kYXRhCQQFAF0AAIAAADoaCWd+rnMR0beE5IbQKkMGbV//6/YgAFBLAQI/AD8AAgAOAHJb0FaLksVmIgAAABAAAAAJAAAAAAAAAAAAAACAAQAAAABsem1hX2RhdGFQSwUGAAAAAAEAAQA3AAAASQAAAAAA"
     data = base64decode(data_b64)
     r = ZipReader(data)
-    @test_throws ArgumentError("invalid compression method: 14. Only Store(0) and Deflate(8) supported for now") zip_test_entry(r, 1)
-    @test_throws ArgumentError("invalid compression method: 14. Only Store(0) and Deflate(8) supported for now") zip_openentry(r, 1)
+    @test_throws ArgumentError("invalid compression method: 14. Only Store(0), Deflate(8), and Deflate64(9) supported for now") zip_test_entry(r, 1)
+    @test_throws ArgumentError("invalid compression method: 14. Only Store(0), Deflate(8), and Deflate64(9) supported for now") zip_openentry(r, 1)
     @test zip_iscompressed(r, 1)
     @test zip_names(r) == ["lzma_data"]
     @test zip_compression_method(r, 1) === 0x000e
@@ -233,8 +234,9 @@ end
                 if zip_isdir(r, i)
                     @test isdir(joinpath(tmpout,name))
                 else
-                    entry_data = zip_readentry(r, i)
-                    @test read(joinpath(tmpout,name)) == entry_data
+                    sevenziphash = open(sha256, joinpath(tmpout,name))
+                    ziphash = zip_openentry(sha256, r, i)
+                    @test sevenziphash == ziphash
                 end
             end
         end