diff --git a/package/lean/kcptun/Makefile b/package/lean/kcptun/Makefile
index a5dd31671..f375f5d95 100644
--- a/package/lean/kcptun/Makefile
+++ b/package/lean/kcptun/Makefile
@@ -13,7 +13,7 @@ PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/xtaci/kcptun/tar.gz/v$(PKG_VERSION)?
-PKG_HASH:=450E586528BD7B2E586605E3A664F77EBD9BAA869918FCC6D6A41F84D4CFB4FD
+PKG_HASH:=450e586528bd7b2e586605e3a664f77ebd9baa869918fcc6d6a41f84d4cfb4fd
 
 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=LICENSE.md