diff --git a/Dangerfile b/Dangerfile
index db017b33..b134a792 100644
--- a/Dangerfile
+++ b/Dangerfile
@@ -1,5 +1,5 @@
 #Check for changes to README.md
-has_readme_changes = !git.modified_files.grep(/README.md).empty?
+has_readme_changes = git.modified_files.include?("README.md")
 
 # Ensure there is a summary for a pull request
 fail 'Please provide a summary in the Pull Request description' if github.pr_body.length < 5