diff --git a/deploy/run-production-canary.sh b/deploy/run-production-canary.sh
index 50360b5..f8f3f9e 100644
--- a/deploy/run-production-canary.sh
+++ b/deploy/run-production-canary.sh
@@ -38,7 +38,7 @@ for container in "${containers[@]}"; do
   [[ "$image_revision" == "$REVISION" ]] || fail_rollback
 done
 
-release_json="$(cat <<JSON
+release_json=$(cat <<JSON
 {
   "id":"candidate-$REVISION",
   "revision":"$REVISION",