diff --git a/requirements.txt b/requirements.txt
index d31f7f2..c4b574a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,3 +18,5 @@ requests ~= 2.23.0
 
 # easy_update/marker.py: 5
 setuptools ~= 45.2.0
+
+distro