diff --git a/projects/docker/requirements.txt b/projects/docker/requirements.txt
index 2abd7d3a956e774cb5b3d3765de5e9b9d66f2d96..8ee34d917d88b6c47caaabe0262eb2697247bc0c 100644
--- a/projects/docker/requirements.txt
+++ b/projects/docker/requirements.txt
@@ -1,2 +1,3 @@
 requests
 ujson
+gemmi