diff --git a/behavior/17_memento/README.md b/behavior/09_memento/README.md
similarity index 100%
rename from behavior/17_memento/README.md
rename to behavior/09_memento/README.md
diff --git a/behavior/17_memento/memento.go b/behavior/09_memento/memento.go
similarity index 100%
rename from behavior/17_memento/memento.go
rename to behavior/09_memento/memento.go
diff --git a/behavior/17_memento/memento_test.go b/behavior/09_memento/memento_test.go
similarity index 100%
rename from behavior/17_memento/memento_test.go
rename to behavior/09_memento/memento_test.go