diff --git a/.gitignore b/.gitignore
index 62e20e1..8215b1a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ __pycache__/__init__.cpython-39.pyc
 .ipynb_checkpoints/hstransform-checkpoint.py
 .ipynb_checkpoints/__init__-checkpoint.py
 tests/.ipynb_checkpoints/test_hstransform-checkpoint.py
+.DS_Store
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diff --git a/img/fault_trajectory.png b/img/fault_trajectory.png
index 9208ef6..7766eb7 100644
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diff --git a/img/power_quality_disturbance.png b/img/power_quality_disturbance.png
index 6144367..514aa72 100644
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diff --git a/img/power_quality_disturbance_trajectory.png b/img/power_quality_disturbance_trajectory.png
index 78c8812..f3d0881 100644
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