diff --git a/index/main.py b/index/main.py
index f310c34..d6083ea 100644
--- a/index/main.py
+++ b/index/main.py
@@ -73,8 +73,8 @@ class SparseVector(BaseModel):
     values: list[float]
 
 
-CHUNK_SIZE = 512
-OVERLAP_SIZE = 192
+CHUNK_SIZE = 256
+OVERLAP_SIZE = 128
 SPARSE_MODEL_NAME = "Qdrant/bm25"
 FASTEMBED_CACHE_PATH = "/models/fastembed"