diff --git a/languages.toml b/languages.toml
index 081b36e20..7b249fc6e 100644
--- a/languages.toml
+++ b/languages.toml
@@ -546,7 +546,7 @@ name = "javascript"
 scope = "source.js"
 injection-regex = "(js|javascript)"
 language-id = "javascript"
-file-types = ["js", "mjs", "cjs"]
+file-types = ["js", "mjs", "cjs", "rules"]
 shebangs = ["node"]
 roots = []
 comment-token = "//"