diff --git a/src/cocoindex_code/indexer.py b/src/cocoindex_code/indexer.py
index 4596011..1ef72e6 100644
--- a/src/cocoindex_code/indexer.py
+++ b/src/cocoindex_code/indexer.py
@@ -14,9 +14,9 @@
 from .shared import CODEBASE_DIR, EMBEDDER, EXT_LANG_OVERRIDE_MAP, SQLITE_DB, CodeChunk
 
 # Chunking configuration
-CHUNK_SIZE = 2000
-MIN_CHUNK_SIZE = 300
-CHUNK_OVERLAP = 200
+CHUNK_SIZE = 800
+MIN_CHUNK_SIZE = 200
+CHUNK_OVERLAP = 150
 
 # Chunking splitter (stateless, can be module-level)
 splitter = RecursiveSplitter()