diff --git a/.DS_Store b/.DS_Store
index 0c62fc4..c41a7de 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/unit04_public_key/.DS_Store b/unit04_public_key/.DS_Store
index 3618fb5..04b78bf 100644
Binary files a/unit04_public_key/.DS_Store and b/unit04_public_key/.DS_Store differ
diff --git a/unit04_public_key/lab/.DS_Store b/unit04_public_key/lab/.DS_Store
index 5cad99c..c27d6da 100644
Binary files a/unit04_public_key/lab/.DS_Store and b/unit04_public_key/lab/.DS_Store differ