1 files changed, 1 insertions, 0 deletions
diff --git a/setup.py b/setup.py
index 76610f0ef..95d920406 100755
--- a/setup.py
+++ b/setup.py
@@ -343,6 +343,7 @@ setup(name='BuildStream',
           'jinja2 >= 2.10',
           'protobuf >= 3.5',
           'grpcio >= 1.10',
+          'sortedcontainers >= 1.5.7',
       ],
       entry_points=bst_install_entry_points,
       tests_require=dev_requires,