diff --git a/ext/.document b/ext/.document
index 3e767d2..76ca952 100644
--- a/ext/.document
+++ b/ext/.document
@@ -10,9 +10,6 @@ gdbm/gdbm.c
 iconv/iconv.c
 io/wait/wait.c
 io/wait/lib
-json/ext/generator/generator.c
-json/ext/parser/parser.c
-json/lib
 nkf/lib/kconv.rb
 nkf/nkf.c
 objspace/objspace.c
diff --git a/lib/.document b/lib/.document
index d3c4a13..90c1753 100644
--- a/lib/.document
+++ b/lib/.document
@@ -63,7 +63,6 @@ prime.rb
 profile.rb
 profiler.rb
 pstore.rb
-racc
 rational.rb
 rdoc.rb
 rdoc