diff --git a/packages/o/onnx/xmake.lua b/packages/o/onnx/xmake.lua
index 937f7fba4b7..5b893f80565 100644
--- a/packages/o/onnx/xmake.lua
+++ b/packages/o/onnx/xmake.lua
@@ -6,6 +6,7 @@ package("onnx")
     add_urls("https://github.com/onnx/onnx/archive/refs/tags/$(version).tar.gz",
              "https://github.com/onnx/onnx.git", {submodules = false})
 
+    add_versions("v1.21.0", "42ffedcd8c9b6363694300c6ffec1ada77f9620176465719acb27b13a4d6f2de")
     add_versions("v1.18.0", "b466af96fd8d9f485d1bb14f9bbdd2dfb8421bc5544583f014088fb941a1d21e")
     add_versions("v1.17.0", "8d5e983c36037003615e5a02d36b18fc286541bf52de1a78f6cf9f32005a820e")
     add_versions("v1.16.2", "84fc1c3d6133417f8a13af6643ed50983c91dacde5ffba16cc8bb39b22c2acbb")