diff --git a/Gemfile b/Gemfile
index 4ddced2..8fc5466 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ gem 'eventmachine', '~> 1.2.7'
 gem 'simpleidn', '~> 0.2.1' # For punycode
 
 # database
-gem 'activerecord', '~> 7.2', '>= 7.2.2.2'
+gem 'activerecord', '~> 8.0', '>= 8.1.3'
 gem 'daemons', '~> 1.4.1'
 gem 'dotenv'
 gem 'pg', '~> 1.6.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index 029d206..d75daba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,37 +1,37 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (7.2.3.1)
-      activesupport (= 7.2.3.1)
-    activerecord (7.2.3.1)
-      activemodel (= 7.2.3.1)
-      activesupport (= 7.2.3.1)
+    activemodel (8.1.3.1)
+      activesupport (= 8.1.3.1)
+    activerecord (8.1.3.1)
+      activemodel (= 8.1.3.1)
+      activesupport (= 8.1.3.1)
       timeout (>= 0.4.0)
-    activesupport (7.2.3.1)
+    activesupport (8.1.3.1)
       base64
-      benchmark (>= 0.3)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.3.1)
       connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
+      json
       logger (>= 1.4.2)
-      minitest (>= 5.1, < 6)
+      minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
     ast (2.4.3)
     base64 (0.3.0)
-    benchmark (0.5.0)
-    bigdecimal (4.0.1)
+    bigdecimal (4.1.2)
     coderay (1.1.3)
-    concurrent-ruby (1.3.7)
+    concurrent-ruby (1.3.8)
     connection_pool (3.0.2)
     daemons (1.4.1)
     docile (1.4.1)
     dotenv (3.2.0)
     drb (2.2.3)
     eventmachine (1.2.7)
-    i18n (1.14.8)
+    i18n (1.15.2)
       concurrent-ruby (~> 1.0)
     io-console (0.8.2)
     json (2.21.2)
@@ -41,7 +41,9 @@ GEM
     method_source (1.1.0)
     mina (1.2.5)
       rake
-    minitest (5.26.2)
+    minitest (6.0.6)
+      drb (~> 2.0)
+      prism (~> 1.5)
     mocha (2.7.1)
       ruby2_keywords (>= 0.0.5)
     ostruct (0.6.3)
@@ -87,12 +89,13 @@ GEM
     simplecov-html (0.13.2)
     simplecov_json_formatter (0.1.4)
     simpleidn (0.2.3)
-    timeout (0.4.3)
+    timeout (0.6.1)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)
     unicode-emoji (4.2.0)
+    uri (1.1.1)
 
 PLATFORMS
   aarch64-linux
@@ -100,7 +103,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  activerecord (~> 7.2, >= 7.2.2.2)
+  activerecord (~> 8.0, >= 8.1.3)
   daemons (~> 1.4.1)
   dotenv
   eventmachine (~> 1.2.7)