diff --git a/support/configs/upx_option b/support/configs/upx_option
index 1e898ab..8d0b34c 100644
--- a/support/configs/upx_option
+++ b/support/configs/upx_option
@@ -1 +1 @@
-upx_c=-1
\ No newline at end of file
+upx_c=--best
\ No newline at end of file