diff --git a/.ruby-version b/.ruby-version
index 8e8299d..35cee72 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.4.2
+2.4.3
diff --git a/.travis.yml b/.travis.yml
index da33b7b..72cd534 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: ruby
 rvm:
-  - "2.4.2"
+  - "2.4.3"
 
 before_install:
   - "phantomjs --version"
diff --git a/Dockerfile b/Dockerfile
index 1b9bc1d..6c15cac 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.4.2
+FROM ruby:2.4.3
 RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
 RUN mkdir /myapp
 WORKDIR /myapp
diff --git a/Gemfile b/Gemfile
index ef6191f..c24895e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ source "https://rubygems.org"
 #don't upgrade
 gem "rails", "5.1.4"
 
-ruby "2.4.2"
+ruby "2.4.3"
 
 gem "aruba"
 gem "bcrypt"
diff --git a/Gemfile.lock b/Gemfile.lock
index a04b3c3..96b29ad 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -370,7 +370,7 @@ DEPENDENCIES
   unicorn
 
 RUBY VERSION
-   ruby 2.4.2p198
+   ruby 2.4.3p205
 
 BUNDLED WITH
    1.16.0
diff --git a/README.md b/README.md
index 1cb9266..5f656de 100755
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ If you are looking for support or troubleshooting assistance, please visit our [
 To begin, install the Ruby Version Manager (RVM):
 
 ```bash
-$ curl -L https://get.rvm.io | bash -s stable --autolibs=3 --ruby=2.4.2
+$ curl -L https://get.rvm.io | bash -s stable --autolibs=3 --ruby=2.4.3
 ```
 
 After installing the package, clone this repo: