diff --git a/system/updated/casync/common.py b/system/updated/casync/common.py
index 7061689c6..b5fb4d580 100644
--- a/system/updated/casync/common.py
+++ b/system/updated/casync/common.py
@@ -6,7 +6,7 @@ import subprocess
 from openpilot.system.version import BUILD_METADATA_FILENAME, BuildMetadata
 
 
-CASYNC_ARGS = ["--with=symlinks", "--with=permissions"]
+CASYNC_ARGS = ["--with=symlinks", "--with=permissions", "--compression=xz"]
 CASYNC_FILES = [BUILD_METADATA_FILENAME, ".caexclude"]