# Markdown processor installed but showing invalid **URL:** \ **Category:** Help\ **Created:** [June 17, 2020, 6:18pm UTC](https://talk.jekyllrb.com/t/markdown-processor-installed-but-showing-invalid/4603 "2020-06-17T18:18:10Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![xmehulx](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/xmehulx/32/2613_2.png) [@xmehulx](https://talk.jekyllrb.com/u/xmehulx)\ **Post date:** [June 17, 2020, 6:18pm UTC](https://talk.jekyllrb.com/t/markdown-processor-installed-but-showing-invalid/4603/1 "2020-06-17T18:18:10Z")
I am using the **rdiscount** markdown which I installed using ```auto $ gem install rdiscount Building native extensions. This could take a while... Successfully installed rdiscount-2.2.0.1 1 gem installed ``` But when I run my website locally it shows ```auto $ bundle exec jekyll serve ... Incremental build: disabled. Enable with --incremental Generating... Jekyll Feed: Generating feed for posts Markdown processor: "rdiscount" is not a valid Markdown processor. Available processors are: kramdown Conversion error: Jekyll::Converters::Markdown encountered an error while converting '_posts/2014-05-10-this-is-a-sample.md': Invalid Markdown processor given: rdiscount ERROR: YOUR SITE COULD NOT BE BUILT: ------------------------------------ Invalid Markdown processor given: rdiscount ``` What is the issue and how to fix it? ---
**Author:** ![chuckhoupt](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/chuckhoupt/32/523_2.png) [@chuckhoupt](https://talk.jekyllrb.com/u/chuckhoupt)\ **Post date:** [June 17, 2020, 6:55pm UTC](https://talk.jekyllrb.com/t/markdown-processor-installed-but-showing-invalid/4603/2 "2020-06-17T18:55:21Z")
Jekyll dropped support for `rdiscount` in version 4, so you’ll need to use Jekyll 3.