diff --git a/.travis.yml b/.travis.yml
index e03d173e..c83d3894 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: ruby
 sudo: false
 cache: bundler
 rvm:
-  - 2.1.8
+  - 2.1.9
   - 2.2.0
   - 2.2.1
   - 2.2.2
diff --git a/README.md b/README.md
index 9624402a..a974eb9a 100644
--- a/README.md
+++ b/README.md
@@ -92,7 +92,7 @@ WPScan comes pre-installed on the following Linux distributions:
 
 Prerequisites:
 
-- Ruby >= 2.1.8 - Recommended: 2.3.0
+- Ruby >= 2.1.9 - Recommended: 2.3.0
 - Curl >= 7.21  - Recommended: latest - FYI the 7.29 has a segfault
 - RubyGems      - Recommended: latest
 - Git
diff --git a/lib/common/common_helper.rb b/lib/common/common_helper.rb
index 87374818..a11a8979 100644
--- a/lib/common/common_helper.rb
+++ b/lib/common/common_helper.rb
@@ -28,7 +28,7 @@ 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')
 
-MIN_RUBY_VERSION = '2.1.8'
+MIN_RUBY_VERSION = '2.1.9'
 
 WPSCAN_VERSION = '2.9'