diff --git a/.gitattributes b/.gitattributes
index ca435795..0545b671 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,3 +1,3 @@
 **/src/main/java/chapi/ast/antlr/** linguist-vendored=true
-_fixtures linguist-vendored=true
-grammars linguist-vendored=true
+_fixtures/** linguist-vendored=true
+grammars/** linguist-vendored=true