diff --git a/.gitignore b/.gitignore
index 679ce397a2..10c58cf685 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
-# Ignore compiled docs
+# Ignore docs files
 _gh_pages
 _site
+.ruby-version
 
 # Numerous always-ignore extensions
 *.diff