diff --git a/container_environment.yaml b/container_environment.yaml
index acbf09d..5dafb88 100644
--- a/container_environment.yaml
+++ b/container_environment.yaml
@@ -18,7 +18,7 @@ dependencies:
  - boto3
  - wget
  - lsst-efd-client
- - rubin-scheduler
+ - rubin-scheduler = 3.4.0
  - rubin-sim
  - pip
  - pip: