diff --git a/conf/depends.txt b/conf/depends.txt
new file mode 100644
index 0000000..9a31865
--- /dev/null
+++ b/conf/depends.txt
@@ -0,0 +1,6 @@
+Mojolicious >= 3.0
+# ldap module
+Net::LDAP
+# email module
+Email::MIME
+Email::Sender