diff --git a/.gitmodules b/.gitmodules
index 24525df..7499484 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "gmssl"]
 	path = gmssl
 	url = https://github.com/guanzhi/GmSSL.git
+[submodule "ecc_rs"]
+	path = ecc_rs
+	url = https://git.mamahaha.work/sangge/ecc_rs.git
diff --git a/ecc_rs b/ecc_rs
new file mode 160000
index 0000000..3f8e0ff
--- /dev/null
+++ b/ecc_rs
@@ -0,0 +1 @@
+Subproject commit 3f8e0ff6c993f2bf4966e6f9d7ea32a01a03b24d