diff --git a/dependencies.list b/dependencies.list
index 948574b0..91dc4769 100644
--- a/dependencies.list
+++ b/dependencies.list
@@ -1,5 +1,5 @@
 PACKAGE_NAME=realm-js
 VERSION=2.1.1
 REALM_CORE_VERSION=4.0.2
-REALM_SYNC_VERSION=2.1.10
+REALM_SYNC_VERSION=2.2.1
 REALM_OBJECT_SERVER_VERSION=2.0.21
diff --git a/package.json b/package.json
index 6f51aca8..164eea8a 100644
--- a/package.json
+++ b/package.json
@@ -80,7 +80,6 @@
   "dependencies": {
     "command-line-args": "^4.0.6",
     "decompress": "^4.2.0",
-    "decompress-tarxz": "^2.1.1",
     "fs-extra": "^4.0.2",
     "ini": "^1.3.4",
     "nan": "^2.3.3",
@@ -91,8 +90,7 @@
     "request": "^2.78.0",
     "stream-counter": "^1.0.0",
     "sync-request": "^3.0.1",
-    "url-parse": "^1.1.7",
-    "lzma-native": "^3.0.4"
+    "url-parse": "^1.1.7"
   },
   "devDependencies": {
     "babel-eslint": "^6.0.4",
diff --git a/scripts/download-realm.js b/scripts/download-realm.js
index f27571ee..9136eaaa 100644
--- a/scripts/download-realm.js
+++ b/scripts/download-realm.js
@@ -98,12 +98,11 @@ function download(serverFolder, archive, destination) {
 
 function extract(downloadedArchive, targetFolder, archiveRootFolder) {
     console.log(`Extracting ${path.basename(downloadedArchive)} => ${targetFolder}`);
-    const decompressOptions = /tar\.xz$/.test(downloadedArchive) ? { plugins: [ require('decompress-tarxz')() ] } : undefined;
     if (!archiveRootFolder) {
-        return decompress(downloadedArchive, targetFolder, decompressOptions);
+        return decompress(downloadedArchive, targetFolder);
     } else {
         const tempExtractLocation = path.resolve(os.tmpdir(), path.basename(downloadedArchive, path.extname(downloadedArchive)));
-        return decompress(downloadedArchive, tempExtractLocation, decompressOptions)
+        return decompress(downloadedArchive, tempExtractLocation)
                .then(() => fs.readdir(path.resolve(tempExtractLocation, archiveRootFolder)))
                .then(items => Promise.all(items.map(item => {
                    const source = path.resolve(tempExtractLocation, archiveRootFolder, item);
@@ -178,7 +177,7 @@ function getSyncRequirements(dependencies, options, required = {}) {
             required.SYNC_ARCHIVE_ROOT = `realm-sync-node-cocoa-${dependencies.REALM_SYNC_VERSION}`;
             return Promise.resolve(required);
         case 'ios':
-            required.SYNC_ARCHIVE = `realm-sync-cocoa-${dependencies.REALM_SYNC_VERSION}.tar.xz`;
+            required.SYNC_ARCHIVE = `realm-sync-cocoa-${dependencies.REALM_SYNC_VERSION}.tar.gz`;
             required.SYNC_ARCHIVE_ROOT = `core`;
             return Promise.resolve(required);
         case 'win': {