diff --git a/scripts/run-task.sh b/scripts/run-task.sh
index 7a8af449..53b67b56 100755
--- a/scripts/run-task.sh
+++ b/scripts/run-task.sh
@@ -11,6 +11,7 @@ cd "$(dirname "$0")/.."
 source scripts/common.sh
 
 load_config
+load_release   # compose requires MOSAIC_IMAGE_TAG; task runs are release-scoped too
 bootstrap_runtime_dir
 
 exec node scripts/mosaic-task.mjs "$@"