diff --git a/.circleci/config.yml b/.circleci/config.yml
index e5490960..19b484e6 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -40,43 +40,6 @@ library_gemfile: &library_gemfile
     - "./gemfiles/mongo_216.gemfile"
     - "./gemfiles/mongo_219.gemfile"
 executors:
-  ruby_27:
-    docker:
-      - image: cimg/ruby:2.7-node
-        environment:
-          MEMCACHED_HOST: '127.0.0.1:11211'
-          REDIS_URL: 'redis://127.0.0.1:6379'
-          DATABASE_URL: 'sqlite3::memory:'
-      - image: memcached
-      - image: redis
-      - image: amazon/dynamodb-local
-      - image: minio/minio:latest
-        command: ["server", "/data"]
-      - image: s12v/sns
-      - image: softwaremill/elasticmq-native
-      - image: mongo:5-focal
-  ruby_27_mysql2:
-    docker:
-      - image: cimg/ruby:2.7-node
-        environment:
-          DATABASE_URL: "mysql2://root@127.0.0.1:3306/ci_test"
-      - image: mariadb
-        environment:
-          MYSQL_DATABASE: 'ci_test'
-          MYSQL_USER: 'root'
-          MYSQL_PASSWORD: ''
-          MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'
-          MYSQL_ROOT_PASSWORD: ''
-          MYSQL_ROOT_HOST: '%'
-  ruby_27_postgres:
-    docker:
-      - image: cimg/ruby:2.7-node
-        environment:
-          DATABASE_URL: "postgres://postgres:test@127.0.0.1:5432/ci_test"
-      - image: postgres
-        environment:
-          POSTGRES_PASSWORD: 'test'
-          POSTGRES_DB: 'ci_test'
   ruby_30:
     docker:
       - image: cimg/ruby:3.0-node
@@ -297,7 +260,7 @@ jobs:
     parameters:
       stack:
         type: executor
-        default: ruby_27
+        default: ruby_30
     executor: << parameters.stack >>
     steps:
       - checkout
@@ -307,7 +270,7 @@ jobs:
     parameters:
       stack:
         type: executor
-        default: ruby_27
+        default: ruby_30
       gemfile:
         type: string
         default: "./gemfiles/aws_30.gemfile"
@@ -320,7 +283,7 @@ jobs:
       - setup
       - run_tests
   lint:
-    executor: ruby_27
+    executor: ruby_30
     steps:
       - checkout
       - setup
@@ -331,7 +294,7 @@ jobs:
       - checkout
       - run_sonarqube
   publish:
-    executor: ruby_27
+    executor: ruby_30
     steps:
       - checkout
       - setup
@@ -353,7 +316,6 @@ workflows:
           matrix:
             parameters:
               stack:
-                - ruby_27
                 - ruby_30
                 - ruby_31
                 - ruby_32
@@ -386,27 +348,6 @@ workflows:
             # https://www.ruby-lang.org/en/news/2022/11/11/ruby-3-2-0-preview3-released/
             - stack: ruby_32
               gemfile: "./gemfiles/sinatra_14.gemfile"
-  libraries_ruby_2:
-    jobs:
-      - test_apprisal:
-          matrix:
-            parameters:
-              stack:
-                - ruby_27
-              <<: *library_gemfile
-  rails_ruby_2:
-    jobs:
-      - test_apprisal:
-          matrix:
-            parameters:
-              stack:
-                - ruby_27
-                - ruby_27_postgres
-                - ruby_27_mysql2
-              gemfile:
-                - "./gemfiles/rails_60.gemfile"
-                - "./gemfiles/rails_52.gemfile"
-                - "./gemfiles/rails_50.gemfile"
   rails_ruby_3:
     jobs:
       - test_apprisal:
diff --git a/instana.gemspec b/instana.gemspec
index f84397e8..cefa4263 100644
--- a/instana.gemspec
+++ b/instana.gemspec
@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
   spec.test_files    = Dir.glob("{test}/**/*.rb")
 
-  spec.required_ruby_version = '>= 2.7'
+  spec.required_ruby_version = '>= 3.0'
   spec.platform      = defined?(JRUBY_VERSION) ? 'java' : Gem::Platform::RUBY
 
   spec.add_development_dependency "bundler", "~> 2.0"