diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 60c462f9..75c7d258 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -40,7 +40,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: [3.1, 3.2, 3.3]
+        ruby-version: [3.2, 3.3]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby
@@ -78,7 +78,7 @@ jobs:
           - 5432:5432
     strategy:
       matrix:
-        ruby-version: [3.1, 3.2, 3.3]
+        ruby-version: [3.2, 3.3]
     steps:
       - uses: actions/checkout@v4
       - name: Install dependencies
@@ -116,7 +116,7 @@ jobs:
           --health-retries=3
     strategy:
       matrix:
-        ruby-version: [3.1, 3.2, 3.3]
+        ruby-version: [3.2, 3.3]
     steps:
       - uses: actions/checkout@v4
       - name: Install dependencies
diff --git a/lib/mihari/version.rb b/lib/mihari/version.rb
index e7a2c764..edfef283 100644
--- a/lib/mihari/version.rb
+++ b/lib/mihari/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Mihari
-  VERSION = "7.7.0"
+  VERSION = "8.0.0"
 end
diff --git a/mihari.gemspec b/mihari.gemspec
index 8104855c..8d4e1dad 100644
--- a/mihari.gemspec
+++ b/mihari.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
   spec.homepage = "https://github.com/ninoseki/mihari"
   spec.license = "MIT"
 
-  spec.required_ruby_version = ">= 3.1"
+  spec.required_ruby_version = ">= 3.2"
 
   spec.metadata["rubygems_mfa_required"] = "true"