diff --git a/BUCK b/BUCK
index c5d6009..e8cbb9a 100644
--- a/BUCK
+++ b/BUCK
@@ -6,7 +6,10 @@
   '//lib/guice:guice',
   '//lib/jgit:jgit',
   '//lib/log:api',
-  '//lib:parboiled-core',
+  '//lib:grappa', # used for it's parboiled part. See
+  # core's 4e69765b9e1acb1dd953dea99dd0ec532dee95e4
+  # and 0db7612e092b37c6ea04883a5a45f51c6d9ae433
+  # for details.
   '//lib:velocity',
 ]