diff --git a/net/sing-box/Makefile b/net/sing-box/Makefile
index 7d38514628..dd50e070b4 100644
--- a/net/sing-box/Makefile
+++ b/net/sing-box/Makefile
@@ -1,12 +1,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=sing-box
-PKG_VERSION:=1.13.18
+PKG_VERSION:=1.13.21
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/SagerNet/sing-box/tar.gz/v$(PKG_VERSION)?
-PKG_HASH:=e41ed9d7adecd7597c1d5cc91818366a9538d94b41c244225ac40ac948c643f5
+PKG_HASH:=c994018d7c2a8fc9fcf6080e4b9cc4f2f915e755342238b77e46fc0806fe96db
 
 PKG_LICENSE:=GPL-3.0-or-later
 PKG_LICENSE_FILES:=LICENSE