diff --git a/mod.conf b/mod.conf
index 5772c4e..09777fc 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,2 +1,3 @@
 name = otp
-optional_depends = mtt
\ No newline at end of file
+optional_depends = mtt
+min_minetest_version = 5.4
\ No newline at end of file