diff --git a/python/requirements.txt b/python/requirements.txt
index c686fdf9995afb7326f0bdc057412bf00a99cda1..c28133c67f6c85e3dd12b08914c7aa0848a4cad7 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -12,6 +12,7 @@ flask>=1.1.2
 click==7.1.2
 itsdangerous==1.1.0
 Jinja2==2.11.3
+pyclipper==1.2.1
 MarkupSafe==1.1.1
 Werkzeug==1.0.1
 ujson>=2.0.3