diff --git a/build-obfs4proxy.py b/build-obfs4proxy.py
index bffd65f53b96f25abd627b171fb3d58db4a614c2..35b44adb627ebe550c2516128752e54f4251a7bf 100755
--- a/build-obfs4proxy.py
+++ b/build-obfs4proxy.py
@@ -29,12 +29,12 @@ def main():
     # Checkout source at specific version
     checkout_source_repo(versions)
 
-    # Build for various Android versions and create package
-    build_android(versions)
-
-    # Build for 64-bit Linux and create package
+    # Build for various Linux architectures and create package
     build_linux(versions)
 
+    # Build for various Android architectures and create package
+    build_android(versions)
+
     # Package both builds
     package_android(versions)
     print()
@@ -114,18 +114,25 @@ def build_android_arch(versions, env, tool, ndk_arch):
     ex(['go', 'build', '-buildmode=%s' % build_mode, '-ldflags', '-w -s' + extldflags] + GO_FLAGS +
        [os.path.join('.', versions['build_path'])], env=env, cwd=REPO_DIR)
 
-    zip_files(['obfs4proxy'], filename)
+    zip_files(['obfs4proxy'], filename, versions)
     os.remove('obfs4proxy')
 
 
 def build_linux(versions):
+    build_linux_arch(versions, 'aarch64', 'arm64')
+    build_linux_arch(versions, 'x86_64', 'amd64')
+
+
+def build_linux_arch(versions, arch, goarch):
     env = os.environ.copy()
     env['CGO_ENABLED'] = "0"
+    env['GOOS'] = "linux"
+    env['GOARCH'] = goarch
     build_path = os.path.join('.', versions['build_path'])
-    filename = "obfs4proxy_linux-x86_64.zip"
+    filename = "obfs4proxy_linux-%s.zip" % arch
     print("Building %s" % filename)
     ex(['go', 'build', '-ldflags', '-w -s'] + GO_FLAGS + [build_path], env=env, cwd=REPO_DIR)
-    zip_files(['obfs4proxy'], 'obfs4proxy_linux-x86_64.zip')
+    zip_files(['obfs4proxy'], filename, versions)
     os.remove('obfs4proxy')
 
 
@@ -136,13 +143,13 @@ def package_android(versions):
 
 
 def package_linux(versions):
-    file_list = ['obfs4proxy_linux-x86_64.zip']
+    file_list = ['obfs4proxy_linux-aarch64.zip', 'obfs4proxy_linux-x86_64.zip']
     package(versions, file_list, android=False)
 
 
 def package(versions, file_list, android):
     zip_file = get_final_file_name(versions, android)
-    zip_files(file_list, zip_file)
+    zip_files(file_list, zip_file, versions)
     create_sources_jar(versions)
     create_pom_file(versions, android)
 
@@ -160,7 +167,7 @@ def create_sources_jar(versions):
     ex(['go', 'mod', 'vendor'], cwd=REPO_DIR)
     jar_files = []
     for file in glob(os.path.join(REPO_DIR, '*')):
-        reset_time(file)
+        reset_time(file, versions)
         jar_files.append(os.path.relpath(file, REPO_DIR))
     jar_file = get_sources_file_name(versions)
     jar_path = os.path.abspath(jar_file)
diff --git a/install.sh b/install.sh
index 65a45e5712c9c5f0367b0cbdfc7b7387831c8f41..b6fce7893c1e2f0ab3de5837096dc8daf3acb3d1 100755
--- a/install.sh
+++ b/install.sh
@@ -3,7 +3,7 @@ set -e
 set -x
 
 # use snapshot repos for deterministic package versions
-DATE="20191010T000000Z"
+DATE="20200922T000000Z"
 cat << EOF > /etc/apt/sources.list
 deb http://snapshot.debian.org/archive/debian/${DATE}/ buster main
 deb http://snapshot.debian.org/archive/debian-security/${DATE}/ buster/updates main
diff --git a/utils.py b/utils.py
index e44852daa6140afebdf708d58a8d217e9ad18c38..9dc75c7206190af7c5fc4abfd3dea297ae3eed12 100644
--- a/utils.py
+++ b/utils.py
@@ -62,13 +62,15 @@ def get_sha256(filename, block_size=65536):
     return sha256.hexdigest()
 
 
-def reset_time(file_name):
-    check_call(['touch', '--no-dereference', '-t', '197001010000.00', file_name])
+def reset_time(filename, versions):
+    if 'timestamp' in versions: timestamp = versions['timestamp']
+    else: timestamp = '197001010000.00'
+    check_call(['touch', '--no-dereference', '-t', timestamp, filename])
 
 
-def zip_files(files, zip_name):
+def zip_files(files, zip_name, versions):
     for file_name in files:
-        reset_time(file_name)
+        reset_time(file_name, versions)
         # use deterministic permissions to prevent differences in zip files
         os.chmod(file_name, 0o755)
         sha256hash = get_sha256(file_name)
diff --git a/versions.json b/versions.json
index 794039d3e7f4321b72c85c177cf351c734b694f5..0f7767a37fe797a3a75d67c130f850330c699b01 100644
--- a/versions.json
+++ b/versions.json
@@ -1,5 +1,20 @@
 {
   "obfs4proxy": {
+    "0.0.11-3": {
+      "repo_url": "https://git.torproject.org/pluggable-transports/obfs4.git",
+      "revision": "obfs4proxy-0.0.11",
+      "build_path": "obfs4proxy",
+      "go": {
+        "version": "go1.13.1",
+        "sha256": "81f154e69544b9fa92b1475ff5f11e64270260d46e7e36c34aafc8bc96209358"
+      },
+      "ndk": {
+        "url": "https://dl.google.com/android/repository/android-ndk-r18-linux-x86_64.zip",
+        "revision": "18.0.5002713",
+        "sha256": "c413dd014edc37f822d0dc88fabc05b64232d07d5c6e9345224e47073fdf140b"
+      },
+      "timestamp": "201001010000.00"
+    },
     "0.0.11-2": {
       "repo_url": "https://git.torproject.org/pluggable-transports/obfs4.git",
       "revision": "obfs4proxy-0.0.11",