diff --git a/.gitignore b/.gitignore
index d6f6a5a..e13f817 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@ __pycache__/
 *.so
 .Python
 build/
+output
 develop-eggs/
 dist/
 downloads/
diff --git a/requirements.txt b/requirements.txt
index d7778da..e69a34b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,10 @@ pandas>=2.0.0
 numpy>=1.24.0
 scikit-learn>=1.3.0
 python-dateutil>=2.8.0
-setuptools>=65.0.0
\ No newline at end of file
+setuptools>=65.0.0
+
+# PII Detection and Anonymization (for cleaning.py)
+presidio-analyzer>=2.2.0
+presidio-anonymizer>=2.2.0
+spacy>=3.7.0
+# Download spaCy model with: python -m spacy download en_core_web_sm
\ No newline at end of file