diff --git a/docker/requirements.txt b/docker/requirements.txt
index 3a1f6fd..2689569 100644
--- a/docker/requirements.txt
+++ b/docker/requirements.txt
@@ -1 +1,2 @@
 openeo-aggregator>=0.37.0.dev
+fiona<1.10  # Workaround for issue with missing libexpat https://github.com/Open-EO/openeo-aggregator/issues/166