diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 92feca6..6dacd8b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,7 +6,7 @@ on:
       version:
         description: 'The version of libFLAC to build'
         required: false
-        default: '1.3.3'
+        default: '1.3.4'
       debug:
         description: 'Enable debug'
         required: false
@@ -14,7 +14,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - name: Install dependencies
       run: |
@@ -23,7 +23,7 @@ jobs:
           autoconf \
           clang \
           gcc-arm-linux-gnueabihf \
-          g++-arm-linux-gnueabihf \
+          gcc-aarch64-linux-gnu \
           libtool \
           mingw-w64 \
           patchelf \
@@ -32,7 +32,7 @@ jobs:
       run: |
         wget https://ftp.osuosl.org/pub/xiph/releases/flac/flac-${{ github.event.inputs.version }}.tar.xz
 
-    - name: Build libFLAC (Linux)
+    - name: Build libFLAC (Linux x86_64)
       run: |
         tar xJf flac-${{ github.event.inputs.version }}.tar.xz
         mv flac-${{ github.event.inputs.version }} flac-linux-x86_64
@@ -44,18 +44,36 @@ jobs:
         cp src/libFLAC/.libs/libFLAC.so.8.3.0 ../linux-x86_64/libFLAC-8.3.0.so
         cd ../linux-x86_64
         patchelf --set-soname libFLAC-8.3.0.so libFLAC-8.3.0.so
-    - name: Upload Linux library
+    - name: Upload Linux x86_64 library
       uses: actions/upload-artifact@v1
       with:
         name: linux-x86_64
         path: linux-x86_64
 
+    - name: Build libFLAC (Linux arm64)
+      run: |
+        tar xJf flac-${{ github.event.inputs.version }}.tar.xz
+        mv flac-${{ github.event.inputs.version }} flac-linux-arm64
+        cd flac-linux-arm64
+        ./configure --host=aarch64-linux-gnu --with-ogg=no --enable-debug=${{ github.event.inputs.debug }} --enable-shared --disable-static --disable-examples
+        make
+        ls -l src/libFLAC/.libs
+        mkdir ../linux-arm64
+        cp src/libFLAC/.libs/libFLAC.so.8.3.0 ../linux-arm64/libFLAC-8.3.0.so
+        cd ../linux-arm64
+        patchelf --set-soname libFLAC-8.3.0.so libFLAC-8.3.0.so
+    - name: Upload Linux arm64 library
+      uses: actions/upload-artifact@v1
+      with:
+        name: linux-arm64
+        path: linux-arm64
+
     - name: Build libFLAC (Windows x64)
       run: |
         tar xJf flac-${{ github.event.inputs.version }}.tar.xz
         mv flac-${{ github.event.inputs.version }} flac-windows-x86_64
         cd flac-windows-x86_64
-        ./configure --host=x86_64-w64-mingw32 --with-ogg=no --enable-debug=${{ github.event.inputs.debug }} --enable-shared --disable-static --disable-examples
+        ./configure --host=x86_64-w64-mingw32 --with-ogg=no --enable-debug=${{ github.event.inputs.debug }} CFLAGS="-D_FORTIFY_SOURCE=0" --enable-shared --disable-static --disable-examples
         make
         ls -l src/libFLAC/.libs
         mkdir ../windows-x86_64
@@ -72,7 +90,7 @@ jobs:
         tar xJf flac-${{ github.event.inputs.version }}.tar.xz
         mv flac-${{ github.event.inputs.version }} flac-windows-i686
         cd flac-windows-i686
-        ./configure --host=i686-w64-mingw32 --with-ogg=no --enable-debug=${{ github.event.inputs.debug }} --enable-shared --disable-static --disable-examples
+        ./configure --host=i686-w64-mingw32 --with-ogg=no --enable-debug=${{ github.event.inputs.debug }} CFLAGS="-D_FORTIFY_SOURCE=0" --enable-shared --disable-static --disable-examples
         make
         ls -l src/libFLAC/.libs
         mkdir ../windows-i686
@@ -102,24 +120,6 @@ jobs:
         name: raspbian-armv7a
         path: raspbian-armv7a
 
-    - name: Build libFLAC (Raspbian armv6z)
-      run: |
-        tar xJf flac-${{ github.event.inputs.version }}.tar.xz
-        mv flac-${{ github.event.inputs.version }} flac-raspbian-armv6z
-        cd flac-raspbian-armv6z
-        ./configure --host=arm-linux-gnueabihf --with-ogg=no --enable-debug=${{ github.event.inputs.debug }} CFLAGS="-mfpu=vfp -mfloat-abi=hard" --enable-shared --disable-static --disable-examples
-        make
-        ls -l src/libFLAC/.libs
-        mkdir ../raspbian-armv6z
-        cp src/libFLAC/.libs/libFLAC.so.8.3.0 ../raspbian-armv6z/libFLAC-8.3.0.so
-        cd ../raspbian-armv6z
-        patchelf --set-soname libFLAC-8.3.0.so libFLAC-8.3.0.so
-    - name: Upload Raspbian armv6z library
-      uses: actions/upload-artifact@v1
-      with:
-        name: raspbian-armv6z
-        path: raspbian-armv6z
-
   build_macos:
     runs-on: macos-latest
     steps:
@@ -129,7 +129,7 @@ jobs:
       run: |
         wget https://ftp.osuosl.org/pub/xiph/releases/flac/flac-${{ github.event.inputs.version }}.tar.xz
         tar xvf flac-${{ github.event.inputs.version }}.tar.xz
-    - name: Build libFLAC
+    - name: Build libFLAC (x86_64)
       run: |
         cd flac-${{ github.event.inputs.version }}
         CC=clang ./configure --with-ogg=no --enable-debug=${{ github.event.inputs.debug }} --enable-shared --disable-static --disable-examples
@@ -139,8 +139,23 @@ jobs:
         cp src/libFLAC/.libs/libFLAC.8.dylib ../darwin-x86_64/
         cd ../darwin-x86_64
         install_name_tool -id @rpath/libFLAC.8.dylib libFLAC.8.dylib
-    - name: Upload macOS library
+    - name: Upload macOS x86_64 library
       uses: actions/upload-artifact@v1
       with:
         name: darwin-x86_64
         path: darwin-x86_64
+    - name: Build libFLAC (arm64)
+      run: |
+        cd flac-${{ github.event.inputs.version }}
+        ./configure --host=aarch64-apple-darwin --with-ogg=no --enable-debug=${{ github.event.inputs.debug }} CFLAGS="-arch arm64 -target arm64-apple-macos11" CXXFLAGS="-arch arm64 -target arm64-apple-macos11" --enable-shared --disable-static --disable-examples
+        make
+        mkdir ../darwin-arm64
+        ls -l src/libFLAC/.libs
+        cp src/libFLAC/.libs/libFLAC.8.dylib ../darwin-arm64/
+        cd ../darwin-arm64
+        install_name_tool -id @rpath/libFLAC.8.dylib libFLAC.8.dylib
+    - name: Upload macOS arm64 library
+      uses: actions/upload-artifact@v1
+      with:
+        name: darwin-arm64
+        path: darwin-arm64
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 987e6e2..9b62d25 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '3.6', '3.7', '3.8', '3.9' ]
+        python-version: [ '3.7', '3.8', '3.9', '3.10' ]
 
     steps:
     - uses: actions/checkout@v2
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 4361989..e1ac802 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,13 @@
 pyFLAC Changelog
 ----------------
 
+**v2.1.0**
+
+* Added support for Linux `arm64` architectures
+* Added support for Darwin `arm64` architectures (macOS Apple Silicon)
+* Fixed Raspberry Pi Zero library (see #13)
+* Updated FLAC library to v1.3.4
+
 **v2.0.0**
 
 * Added `seek` and `tell` callbacks to `StreamEncoder`
diff --git a/MANIFEST.in b/MANIFEST.in
index 37f4ddb..fa4006a 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -12,7 +12,9 @@ include pyflac/builder/*.py
 include pyflac/include/FLAC/*.h
 include pyflac/libraries/LICENSE
 include pyflac/libraries/darwin-x86_64/*.dylib
+include pyflac/libraries/darwin-arm64/*.dylib
 include pyflac/libraries/linux-x86_64/*.so
+include pyflac/libraries/linux-arm64/*.so
 include pyflac/libraries/raspbian-armv7a/*.so
 include pyflac/libraries/raspbian-armv6z/*.so
 include pyflac/libraries/windows-i686/*.dll
diff --git a/README.rst b/README.rst
index da334d7..1354121 100644
--- a/README.rst
+++ b/README.rst
@@ -43,10 +43,10 @@ You can use pip to download and install the latest release with a single command
 Supported platforms
 -------------------
 
-- macOS
-- Linux
-- RPi Zero/2/3/4
-- Windows 7/8/10
+- **macOS** (Intel/Apple Silicon)
+- **Linux** (x86_64/arm64)
+- **RPi** Zero/2/3/4
+- **Windows** 7/8/10
 
 
 CLI
diff --git a/docs/index.rst b/docs/index.rst
index b7a7d8c..a931db4 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -32,7 +32,6 @@ Limitations
 
 - pyFLAC currently only supports 16-bit audio.
 - FLAC metadata handling is not implemented.
-- Seek/tell functionality is not implemented.
 
 
 API Reference
diff --git a/pyflac/__init__.py b/pyflac/__init__.py
index 4c42cfd..08e5765 100644
--- a/pyflac/__init__.py
+++ b/pyflac/__init__.py
@@ -10,7 +10,7 @@
 # ------------------------------------------------------------------------------
 
 __title__ = 'pyFLAC'
-__version__ = '2.0.0'
+__version__ = '2.1.0'
 __all__ = [
     'StreamEncoder',
     'FileEncoder',
diff --git a/pyflac/builder/build_args.py b/pyflac/builder/build_args.py
index 5e137b4..b628974 100644
--- a/pyflac/builder/build_args.py
+++ b/pyflac/builder/build_args.py
@@ -24,7 +24,12 @@ def get_build_kwargs():
     }
 
     if system == 'Darwin':
-        architecture = 'darwin-x86_64'
+        cpuinfo = subprocess.check_output(['sysctl', '-n', 'machdep.cpu.brand_string']).decode()
+        if cpuinfo.startswith('Apple'):
+            architecture = 'darwin-arm64'
+        else:
+            architecture = 'darwin-x86_64'
+
         build_kwargs['libraries'] = ['FLAC.8']
         build_kwargs['library_dirs'] = [os.path.join(package_path, 'libraries', architecture)]
         build_kwargs['extra_link_args'] = ['-Wl,-rpath,@loader_path/libraries/' + architecture]
@@ -36,6 +41,8 @@ def get_build_kwargs():
                 architecture = 'raspbian-armv7a'
             else:
                 architecture = 'raspbian-armv6z'
+        elif platform.machine() == 'aarch64':
+            architecture = 'linux-arm64'
         else:
             architecture = 'linux-x86_64'
 
diff --git a/pyflac/include/FLAC/export.h b/pyflac/include/FLAC/export.h
index d52f0bb..3e3e764 100644
--- a/pyflac/include/FLAC/export.h
+++ b/pyflac/include/FLAC/export.h
@@ -36,7 +36,7 @@
 /** \file include/FLAC/export.h
  *
  *  \brief
- *  This module contains #defines and symbols for exporting function
+ *  This module contains \#defines and symbols for exporting function
  *  calls, and providing version information and compiled-in features.
  *
  *  See the \link flac_export export \endlink module.
@@ -46,7 +46,7 @@
  *  \ingroup flac
  *
  *  \brief
- *  This module contains #defines and symbols for exporting function
+ *  This module contains \#defines and symbols for exporting function
  *  calls, and providing version information and compiled-in features.
  *
  *  If you are compiling with MSVC and will link to the static library
@@ -59,7 +59,7 @@
 #if defined(FLAC__NO_DLL)
 #define FLAC_API
 
-#elif defined(_MSC_VER)
+#elif defined(_WIN32)
 #ifdef FLAC_API_EXPORTS
 #define	FLAC_API __declspec(dllexport)
 #else
@@ -74,7 +74,7 @@
 
 #endif
 
-/** These #defines will mirror the libtool-based library version number, see
+/** These \#defines will mirror the libtool-based library version number, see
  * http://www.gnu.org/software/libtool/manual/libtool.html#Libtool-versioning
  */
 #define FLAC_API_VERSION_CURRENT 11
diff --git a/pyflac/libraries/darwin-arm64/libFLAC.8.dylib b/pyflac/libraries/darwin-arm64/libFLAC.8.dylib
new file mode 100644
index 0000000..304d556
Binary files /dev/null and b/pyflac/libraries/darwin-arm64/libFLAC.8.dylib differ
diff --git a/pyflac/libraries/darwin-x86_64/libFLAC.8.dylib b/pyflac/libraries/darwin-x86_64/libFLAC.8.dylib
index 06dd75a..38b0d46 100644
Binary files a/pyflac/libraries/darwin-x86_64/libFLAC.8.dylib and b/pyflac/libraries/darwin-x86_64/libFLAC.8.dylib differ
diff --git a/pyflac/libraries/linux-arm64/libFLAC-8.3.0.so b/pyflac/libraries/linux-arm64/libFLAC-8.3.0.so
new file mode 100644
index 0000000..3cde363
Binary files /dev/null and b/pyflac/libraries/linux-arm64/libFLAC-8.3.0.so differ
diff --git a/pyflac/libraries/linux-x86_64/libFLAC-8.3.0.so b/pyflac/libraries/linux-x86_64/libFLAC-8.3.0.so
index 02f9aa7..c65f780 100644
Binary files a/pyflac/libraries/linux-x86_64/libFLAC-8.3.0.so and b/pyflac/libraries/linux-x86_64/libFLAC-8.3.0.so differ
diff --git a/pyflac/libraries/raspbian-armv6z/libFLAC-8.3.0.so b/pyflac/libraries/raspbian-armv6z/libFLAC-8.3.0.so
index b7d326e..211ac81 100644
Binary files a/pyflac/libraries/raspbian-armv6z/libFLAC-8.3.0.so and b/pyflac/libraries/raspbian-armv6z/libFLAC-8.3.0.so differ
diff --git a/pyflac/libraries/raspbian-armv7a/libFLAC-8.3.0.so b/pyflac/libraries/raspbian-armv7a/libFLAC-8.3.0.so
index b730034..e11f91b 100644
Binary files a/pyflac/libraries/raspbian-armv7a/libFLAC-8.3.0.so and b/pyflac/libraries/raspbian-armv7a/libFLAC-8.3.0.so differ
diff --git a/pyflac/libraries/windows-i686/FLAC-8.lib b/pyflac/libraries/windows-i686/FLAC-8.lib
index 3c2be8a..3b09a12 100644
Binary files a/pyflac/libraries/windows-i686/FLAC-8.lib and b/pyflac/libraries/windows-i686/FLAC-8.lib differ
diff --git a/pyflac/libraries/windows-i686/libFLAC-8.dll b/pyflac/libraries/windows-i686/libFLAC-8.dll
index 9c0893d..60a088d 100644
Binary files a/pyflac/libraries/windows-i686/libFLAC-8.dll and b/pyflac/libraries/windows-i686/libFLAC-8.dll differ
diff --git a/pyflac/libraries/windows-x86_64/FLAC-8.lib b/pyflac/libraries/windows-x86_64/FLAC-8.lib
index e3dcab1..9737716 100644
Binary files a/pyflac/libraries/windows-x86_64/FLAC-8.lib and b/pyflac/libraries/windows-x86_64/FLAC-8.lib differ
diff --git a/pyflac/libraries/windows-x86_64/libFLAC-8.dll b/pyflac/libraries/windows-x86_64/libFLAC-8.dll
index 4e78118..fb694d6 100644
Binary files a/pyflac/libraries/windows-x86_64/libFLAC-8.dll and b/pyflac/libraries/windows-x86_64/libFLAC-8.dll differ
diff --git a/setup.cfg b/setup.cfg
index 9692d51..94b60b5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [metadata]
-description-file = README.rst
+description_file = README.rst
 
 [build_sphinx]
 source-dir = docs
@@ -10,4 +10,4 @@ all_files  = 1
 upload-dir = docs/_build/html
 
 [flake8]
-max-line-length = 120
\ No newline at end of file
+max-line-length = 120
diff --git a/setup.py b/setup.py
index 31b9ff0..fad452a 100644
--- a/setup.py
+++ b/setup.py
@@ -41,12 +41,12 @@ def read(fname):
     ],
     install_requires=[
         'cffi>=1.4.0',
-        'numpy; python_version >= "3.7.0"',
-        'numpy<=1.19.5; python_version < "3.7.0"',
-        'SoundFile>=0.8.0',
+        'numpy>=1.22; python_version >= "3.8"',
+        'numpy<1.22; python_version < "3.8.0"',
+        'SoundFile>=0.11',
     ],
     test_suite='tests',
-    python_requires='>=3.6',
+    python_requires='>=3.7',
     entry_points={
         'console_scripts': [
             'pyflac = pyflac.__main__:main',
@@ -58,10 +58,10 @@ def read(fname):
         'Intended Audience :: Science/Research',
         'License :: OSI Approved :: Apache Software License',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
         'Topic :: Multimedia :: Sound/Audio',
     ],
 )
diff --git a/tox.ini b/tox.ini
index c9dc4c2..1aafdcc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py36, py37, py38, py39
+envlist = py37, py38, py39, py310
 
 [testenv]
 deps = pytest==6.2.2