diff --git a/docker-compose.yml b/docker-compose.yml
index 4b986d5..0f0b349 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -149,7 +149,7 @@ services:
       #       → 32 한도 초과 → 413. 64 로 늘림.
       # GPU VRAM free 6199MiB 충분. baseline path (MAX_RERANK_INPUT=200) 영향 0.
       - MAX_BATCH_TOKENS=16384
-      - MAX_CLIENT_BATCH_SIZE=64
+      - MAX_CLIENT_BATCH_SIZE=256  # 2026-06-18 fix: 64→256, MAX_RERANK_INPUT=200 커버 (batch>64 ERROR=RRF silent fallback 해소; MAX_BATCH_TOKENS가 VRAM 상한이라 entries 증가는 VRAM 무관)
       - MAX_CONCURRENT_REQUESTS=4
     volumes:
       - reranker_cache:/data