diff --git a/device.mk b/device.mk
index a3f870d..066a6ac 100644
--- a/device.mk
+++ b/device.mk
@@ -21,13 +21,13 @@ AB_OTA_PARTITIONS := \
 AB_OTA_POSTINSTALL_CONFIG += \
     RUN_POSTINSTALL_system=true \
     POSTINSTALL_PATH_system=system/bin/otapreopt_script \
-    FILESYSTEM_TYPE_system=ext4 \
+    FILESYSTEM_TYPE_system=erofs \
     POSTINSTALL_OPTIONAL_system=true
 
 AB_OTA_POSTINSTALL_CONFIG += \
     RUN_POSTINSTALL_vendor=true \
     POSTINSTALL_PATH_vendor=bin/checkpoint_gc \
-    FILESYSTEM_TYPE_vendor=ext4 \
+    FILESYSTEM_TYPE_vendor=erofs \
     POSTINSTALL_OPTIONAL_vendor=true
 
 PRODUCT_PACKAGES += \