diff --git a/.circleci/config.yml b/.circleci/config.yml
index ce6af67..8efc4fd 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -23,9 +23,6 @@ jobs:
 workflows:
   build:
     jobs:
-      - rake_default:
-          name: Ruby 2.5
-          image: cimg/ruby:2.5
       - rake_default:
           name: Ruby 2.6
           image: cimg/ruby:2.6
@@ -42,5 +39,5 @@ workflows:
           name: Ruby HEAD
           image: rubocophq/circleci-ruby-snapshot:latest # Nightly snapshot build
       - rake_default:
-          name: JRuby 9.2
-          image: circleci/jruby:9.2
+          name: JRuby 9.3
+          image: circleci/jruby:9.3
diff --git a/.rubocop.yml b/.rubocop.yml
index 3d9813a..16630b5 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -8,7 +8,7 @@ require:
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.6
 
 Naming/PredicateName:
   # Method define macros for dynamically generated method.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 571303a..28e6b14 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 ### Changes
 
-* Drop support for Ruby 2.4. ([@koic][])
+* Drop support for Ruby 2.4 and 2.5. ([@koic][])
 
 ## 1.1.0 (2020-06-11)
 
diff --git a/rubocop-faker.gemspec b/rubocop-faker.gemspec
index e980d7c..0688fd4 100644
--- a/rubocop-faker.gemspec
+++ b/rubocop-faker.gemspec
@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.description   = 'A RuboCop extension for Faker.'
   spec.homepage      = 'https://github.com/koic/rubocop-faker'
   spec.license       = 'MIT'
-  spec.required_ruby_version = Gem::Requirement.new('>= 2.5.0')
+  spec.required_ruby_version = Gem::Requirement.new('>= 2.6.0')
 
   spec.metadata = {
     'homepage_uri' => spec.homepage,