diff --git a/rag/raptor.py b/rag/raptor.py
index 007f2529a..db2c82d2e 100644
--- a/rag/raptor.py
+++ b/rag/raptor.py
@@ -151,8 +151,7 @@ class RecursiveAbstractiveProcessing4TreeOrganizedRetrieval:
                 for c in range(n_clusters):
                     ck_idx = [i + start for i in range(len(lbls)) if lbls[i] == c]
                     assert len(ck_idx) > 0
-                    async with chat_limiter:
-                        nursery.start_soon(summarize, ck_idx)
+                    nursery.start_soon(summarize, ck_idx)
 
             assert len(chunks) - end == n_clusters, "{} vs. {}".format(
                 len(chunks) - end, n_clusters