--- a/minitest-around.gemspec
+++ b/minitest-around.gemspec
@@ -7,7 +7,7 @@
   s.summary     = "Around block for minitest."
   s.description = "Alternative for setup/teardown dance."
   s.license     = 'MIT'
-  s.files       = `git ls-files`.split("\n")
+  s.files       = Dir['lib/**/*']
 
   s.add_dependency 'minitest', '~> 5.0'