diff --git a/pub_sub/python/requirements.txt b/pub_sub/python/requirements.txt
new file mode 100644
index 00000000..06bcc109
--- /dev/null
+++ b/pub_sub/python/requirements.txt
@@ -0,0 +1,8 @@
+Click==7.0
+Flask==1.1.1
+Flask-Cors==3.0.9
+itsdangerous==1.1.0
+Jinja2==2.10.1
+MarkupSafe==1.1.1
+six==1.12.0
+Werkzeug==0.15.6