diff --git a/__pycache__/utils.cpython-35.pyc b/__pycache__/utils.cpython-35.pyc
new file mode 100644
index 0000000..d4a44fa
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diff --git a/gpt2/src/__pycache__/encoder.cpython-35.pyc b/gpt2/src/__pycache__/encoder.cpython-35.pyc
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diff --git a/requirements.txt b/requirements.txt
index 18c6d2c..b18ec72 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 google-cloud-storage
 numpy
 flask
+regex
 gunicorn
 google-api-python-client