diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 71f5c71e..4a000281 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -721,6 +721,7 @@ Ruby:
   - Rakefile
   - Thorfile
   - Gemfile
+  - Vagrantfile
 
 Rust:
   type: programming