diff --git a/semaphore/main.go b/synchronization/semaphore/main.go
similarity index 100%
rename from semaphore/main.go
rename to synchronization/semaphore/main.go
diff --git a/concurrency/simplesem/main.go b/synchronization/simplesem/main.go
similarity index 100%
rename from concurrency/simplesem/main.go
rename to synchronization/simplesem/main.go