diff --git a/tempo/config.yaml b/tempo/config.yaml
index 79e7f33..ee5dfd8 100644
--- a/tempo/config.yaml
+++ b/tempo/config.yaml
@@ -25,6 +25,7 @@ compactor:
     block_retention: 168h # 7 days
     compacted_block_retention: 30m
     v2_prefetch_traces_count: 100
+    retention_concurrency: 1
 
 storage:
   trace: