diff --git a/pyproject.toml b/pyproject.toml
index 4efedf0..dbe07a8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,7 +73,8 @@ mcp = [
 # fall back to a dependency-free regex indexer without this — see backends/codegraph.py.
 code = [
     "tree-sitter>=0.23",
-    "tree-sitter-language-pack==0.9.0",
+    "tree-sitter-language-pack==0.9.0; python_version < '3.10'",
+    "tree-sitter-language-pack==1.13.3; python_version >= '3.10'",
 ]
 # Local resource extraction. Text/code/HTML/DOCX remain stdlib-only; this adds PDF
 # extraction and image OCR bindings (the Tesseract executable is installed separately).
@@ -116,7 +117,8 @@ all = [
     "pydantic-settings>=2.14.2; python_version >= '3.10'",
     "cryptography>=48.0.1; python_version >= '3.10'",
     "tree-sitter>=0.23",
-    "tree-sitter-language-pack==0.9.0",
+    "tree-sitter-language-pack==0.9.0; python_version < '3.10'",
+    "tree-sitter-language-pack==1.13.3; python_version >= '3.10'",
     "pypdf>=4.0",
     "Pillow>=12.3.0; python_version >= '3.10'",
     "pytesseract>=0.3.10",
@@ -145,7 +147,8 @@ test = [
     "pydantic-settings>=2.14.2; python_version >= '3.10'",
     "cryptography>=48.0.1; python_version >= '3.10'",
     "tree-sitter>=0.23",
-    "tree-sitter-language-pack==0.9.0",
+    "tree-sitter-language-pack==0.9.0; python_version < '3.10'",
+    "tree-sitter-language-pack==1.13.3; python_version >= '3.10'",
     "pypdf>=4.0",
     "Pillow>=12.3.0; python_version >= '3.10'",
     "pytesseract>=0.3.10",