version 2.1.8 minimum requirement

README.md

@@ -92,7 +92,7 @@ WPScan comes pre-installed on the following Linux distributions:
 
 Prerequisites:
 
-- Ruby >= 2.1.0 - Recommended: 2.3.0
+- Ruby >= 2.1.8 - Recommended: 2.3.0
 - Curl >= 7.21  - Recommended: latest - FYI the 7.29 has a segfault
 - RubyGems      - Recommended: latest
 - Git

lib/common/common_helper.rb

@@ -28,7 +28,9 @@ LOCAL_FILES_XSD   = File.join(DATA_DIR, 'local_vulnerable_files.xsd')
 USER_AGENTS_FILE  = File.join(DATA_DIR, 'user-agents.txt')
 LAST_UPDATE_FILE  = File.join(DATA_DIR, '.last_update')
 
-WPSCAN_VERSION       = '2.9'
+MIN_RUBY_VERSION = '2.1.8'
+
+WPSCAN_VERSION = '2.9'
 
 $LOAD_PATH.unshift(LIB_DIR)
 $LOAD_PATH.unshift(WPSCAN_LIB_DIR)

lib/environment.rb

@@ -3,8 +3,9 @@
 require 'rubygems'
 
 version = RUBY_VERSION.dup
-if Gem::Version.create(version) < Gem::Version.create(2.1)
-  puts "Ruby >= 2.1.0 required to run wpscan (You have #{version})"
+
+if Gem::Version.create(version) < Gem::Version.create(MIN_RUBY_VERSION)
+  puts "Ruby >= #{MIN_RUBY_VERSION} required to run wpscan (You have #{version})"
   exit(1)
 end