diff --git a/requirements.txt b/requirements.txt
index c295c164..904bdf11 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,6 +27,7 @@ humanize==4.9.0
 python-slugify==8.0.1
 geomet==1.1.0
 PyYAML==6.0.1
+geojson-stats==0.2.5
 ## documentation
 # mkdocs-material==8.5.11
 # mkdocs-jupyter==0.22.0