diff --git a/requirements.txt b/requirements.txt
index 899a1abe..e91576a3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,6 +42,7 @@ mccabe==0.6.1
 modulegraph==0.18
 more-itertools==7.2.0
 multidict==4.7.6
+osxmetadata>=0.99.11
 packaging==19.0
 parso==0.6.2
 pathspec==0.7.0