resolve security vulnerabilities 
resolve security vulnerabilities 

Dependency
redcloth	
Version < 4.3.0	
Upgrade to ~> 4.3.0
Vulnerabilities CVE-2012-6684 Moderate severity

Dependency
activesupport	
Version >= 4.2.0 < 4.2.2	
Upgrade to ~> 4.2.2
Vulnerabilities 
CVE-2015-3227 Moderate severity
CVE-2015-3226 Moderate severity

Dependency
yajl-ruby	
Version < 1.3.1	
Upgrade to ~> 1.3.1
Vulnerabilities
CVE-2017-16516 High severity
asaed/poc-jekyll,asaed/poc-jekyll