diff --git a/ext/json/json.gemspec b/ext/json/json.gemspec
index 5a951a8b25..3ded3613d6 100644
--- a/ext/json/json.gemspec
+++ b/ext/json/json.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
   s.rdoc_options = ["--title", "JSON implementation for Ruby", "--main", "README.md"]
   s.files = [
     "CHANGES.md",
-    "LICENSE",
+    "COPYING",
     "README.md",
     "ext/json/ext/fbuffer/fbuffer.h",
     "ext/json/ext/generator/depend",