diff --git a/.gitignore b/.gitignore
index 51706fa962..45de01f3f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -110,6 +110,7 @@
 **/vendor/bundle/ruby/*/gems/pry-*/
 **/vendor/bundle/ruby/*/gems/rainbow-*/
 **/vendor/bundle/ruby/*/gems/rdiscount-*/
+**/vendor/bundle/ruby/*/gems/regexp_parser-*/
 **/vendor/bundle/ruby/*/gems/ronn-*/
 **/vendor/bundle/ruby/*/gems/rspec-*/
 **/vendor/bundle/ruby/*/gems/rspec-core-*/