diff --git a/.github/workflows/ruby-windows.yml b/.github/workflows/ruby-windows.yml
index 5370906bf..397bc7acd 100644
--- a/.github/workflows/ruby-windows.yml
+++ b/.github/workflows/ruby-windows.yml
@@ -11,7 +11,6 @@ jobs:
     strategy:
       matrix:
         ruby_version:
-        - "3.0"
         - "3.1"
         - "3.2"
         - "3.3"
diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 1d849058f..ddb451207 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['3.0', '3.1', '3.2', '3.3']
+        ruby: ['3.1', '3.2', '3.3']
         task:
           - test
           - test:output
diff --git a/steep.gemspec b/steep.gemspec
index 934e9eef3..10ec760e2 100644
--- a/steep.gemspec
+++ b/steep.gemspec
@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = '>= 3.0.0'
+  spec.required_ruby_version = '>= 3.1.0'
 
   spec.add_runtime_dependency "parser", ">= 3.1"
   spec.add_runtime_dependency "activesupport", ">= 5.1"