diff --git a/.gitmodules b/.gitmodules
index 226d184b..a0ef671b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "submodules/crypto-specs"]
 	path = submodules/crypto-specs
 	url = https://github.com/formosa-crypto/crypto-specs.git
+[submodule "submodules/formosa-25519"]
+	path = submodules/formosa-25519
+	url = https://github.com/formosa-crypto/formosa-25519.git
diff --git a/submodules/formosa-25519 b/submodules/formosa-25519
new file mode 160000
index 00000000..2c230ade
--- /dev/null
+++ b/submodules/formosa-25519
@@ -0,0 +1 @@
+Subproject commit 2c230ade5aad8c307652915cf3af040e6d816bd0