diff --git a/functions_lib.sh b/functions_lib.sh
index 26062c8..f7c32ba 100644
--- a/functions_lib.sh
+++ b/functions_lib.sh
@@ -131,6 +131,7 @@ docker_swarm_configuration() {
   check_7_1
   check_7_2
   check_7_3
+  check_7_4
   check_7_5
   check_7_6
   check_7_7