diff --git a/.gitmodules b/.gitmodules
index e7a3196..b363ed3 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -83,3 +83,6 @@
 [submodule "ctfd-bitcoin-rewards-challenge"]
 	path = ctfd-bitcoin-rewards-challenge
 	url = git@github.com:aljazceru/ctfd-bitcoin-rewards-challenge.git
+[submodule "CTFd-SSO-plugin"]
+	path = CTFd-SSO-plugin
+	url = https://github.com/riccardotornesello/CTFd-SSO-plugin.git
diff --git a/CTFd-SSO-plugin b/CTFd-SSO-plugin
new file mode 160000
index 0000000..8f73d81
--- /dev/null
+++ b/CTFd-SSO-plugin
@@ -0,0 +1 @@
+Subproject commit 8f73d81d169043ea42ff84e7fbef980ebea4ad75