diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2f5beb76..02d307d6 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,9 +13,10 @@ jobs:
 
     strategy:
       fail-fast: false
+      max-parallel: 8
       matrix:
-        activerecord: ["6.1", "7.0", "7.1"]
-        ruby: ["3.0", "3.1", "3.2", "3.3", "head"]
+        activerecord: ["6.1", "7.0", "7.1", "head"]
+        ruby: ["3.1", "3.2", "3.3", "head"]
         mysql: ["5.7", "8.0"]
         adapter: ["mysql2", "trilogy"]
         exclude:
@@ -23,6 +24,8 @@ jobs:
             ruby: head
           - activerecord: 7.0
             ruby: head
+          - activerecord: head
+            ruby: 3.0
 
     env:
       BUNDLE_GEMFILE: "${{ github.workspace }}/gemfiles/activerecord_${{ matrix.activerecord }}.gemfile"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 10c1815b..6959e8f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Unreleased
 
+# 4.3.0 (Aug, 2024)
+* Drop support for Ruby 3.0, as it reached its EOL
+* Add support for next Rails version
+
 # 4.2.3 (Jul, 2024)
 * Fix check for warnings against PKs with line breaks
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 825376ae..ece21e77 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,19 +1,19 @@
 PATH
   remote: .
   specs:
-    lhm-shopify (4.2.3)
+    lhm-shopify (4.3.0)
       retriable (>= 3.0.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (7.1.1)
-      activesupport (= 7.1.1)
-    activerecord (7.1.1)
-      activemodel (= 7.1.1)
-      activesupport (= 7.1.1)
+    activemodel (7.1.3.4)
+      activesupport (= 7.1.3.4)
+    activerecord (7.1.3.4)
+      activemodel (= 7.1.3.4)
+      activesupport (= 7.1.3.4)
       timeout (>= 0.4.0)
-    activesupport (7.1.1)
+    activesupport (7.1.3.4)
       base64
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
@@ -28,22 +28,21 @@ GEM
       bundler
       rake
       thor (>= 0.14.0)
-    base64 (0.1.1)
-    bigdecimal (3.1.4)
+    base64 (0.2.0)
+    bigdecimal (3.1.8)
     byebug (11.1.3)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.3.3)
     connection_pool (2.4.1)
-    docile (1.4.0)
-    drb (2.1.1)
-      ruby2_keywords
-    i18n (1.14.1)
+    docile (1.4.1)
+    drb (2.2.1)
+    i18n (1.14.5)
       concurrent-ruby (~> 1.0)
-    minitest (5.22.2)
-    mocha (2.1.0)
+    minitest (5.24.1)
+    mocha (2.4.5)
       ruby2_keywords (>= 0.0.5)
-    mutex_m (0.1.2)
-    mysql2 (0.5.5)
-    rake (13.0.6)
+    mutex_m (0.2.0)
+    mysql2 (0.5.6)
+    rake (13.2.1)
     retriable (3.1.2)
     ruby2_keywords (0.0.5)
     simplecov (0.22.0)
@@ -52,10 +51,10 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
-    thor (1.2.2)
-    timeout (0.4.0)
+    thor (1.3.1)
+    timeout (0.4.1)
     toxiproxy (2.0.2)
-    trilogy (2.6.0)
+    trilogy (2.8.1)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
 
diff --git a/dev.yml b/dev.yml
index aeb570f1..85430e38 100644
--- a/dev.yml
+++ b/dev.yml
@@ -1,9 +1,7 @@
 name: lhm
 up:
-  - homebrew:
-      - mysql-client@5.7:
-          or: [mysql@5.7]
-          conflicts: [shopify/shopify/mysql-client, mysql-connector-c, mysql, mysql-client]
+  - packages:
+      - mysql-client@5.7
       - wget
   - ruby
   - bundler
diff --git a/gemfiles/activerecord_6.1.gemfile.lock b/gemfiles/activerecord_6.1.gemfile.lock
index 7ba456e0..df040da1 100644
--- a/gemfiles/activerecord_6.1.gemfile.lock
+++ b/gemfiles/activerecord_6.1.gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    lhm-shopify (4.2.3)
+    lhm-shopify (4.3.0)
       retriable (>= 3.0.0)
 
 GEM
diff --git a/gemfiles/activerecord_7.0.gemfile.lock b/gemfiles/activerecord_7.0.gemfile.lock
index e6c6164c..b89fd98f 100644
--- a/gemfiles/activerecord_7.0.gemfile.lock
+++ b/gemfiles/activerecord_7.0.gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    lhm-shopify (4.2.3)
+    lhm-shopify (4.3.0)
       retriable (>= 3.0.0)
 
 GEM
diff --git a/gemfiles/activerecord_7.1.gemfile.lock b/gemfiles/activerecord_7.1.gemfile.lock
index e7a2153f..88cd40f9 100644
--- a/gemfiles/activerecord_7.1.gemfile.lock
+++ b/gemfiles/activerecord_7.1.gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    lhm-shopify (4.2.3)
+    lhm-shopify (4.3.0)
       retriable (>= 3.0.0)
 
 GEM
diff --git a/gemfiles/activerecord_head.gemfile b/gemfiles/activerecord_head.gemfile
new file mode 100644
index 00000000..05d9d8f0
--- /dev/null
+++ b/gemfiles/activerecord_head.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activerecord", git: "https://github.com/rails/rails.git", branch: "main"
+
+gemspec path: "../"
diff --git a/lib/lhm/sql_helper.rb b/lib/lhm/sql_helper.rb
index ce2e77bd..8e819864 100644
--- a/lib/lhm/sql_helper.rb
+++ b/lib/lhm/sql_helper.rb
@@ -65,7 +65,7 @@ def supports_atomic_switch?
     end
 
     def struct_key(struct, key)
-      keys = if struct.is_a? Hash
+      keys = if struct.respond_to?(:keys)
                struct.keys
              else
                struct.members
diff --git a/lib/lhm/version.rb b/lib/lhm/version.rb
index 4501248c..60096e2d 100644
--- a/lib/lhm/version.rb
+++ b/lib/lhm/version.rb
@@ -2,5 +2,5 @@
 # Schmidt
 
 module Lhm
-  VERSION = '4.2.3'
+  VERSION = '4.3.0'
 end
diff --git a/spec/integration/lhm_spec.rb b/spec/integration/lhm_spec.rb
index 5be4b3ee..85814605 100644
--- a/spec/integration/lhm_spec.rb
+++ b/spec/integration/lhm_spec.rb
@@ -328,8 +328,7 @@
           :collate => collation,
         })
 
-        result = select_one('SELECT login from users')
-        result = result['login'] if result.respond_to?(:has_key?)
+        result = select_value('SELECT login from users')
         value(result).must_equal('a user')
       end
     end
@@ -353,8 +352,7 @@
           :collate => collation,
         })
 
-        result = select_one('SELECT `fnord` from users')
-        result = result['fnord'] if result.respond_to?(:has_key?)
+        result = select_value('SELECT `fnord` from users')
         value(result).must_equal('Superfriends')
       end
     end
@@ -380,8 +378,7 @@
              :collate => 'utf8mb4_unicode_ci',
            })
 
-        result = select_one('SELECT `user_name` from users')
-        result = result['user_name'] if result.respond_to?(:has_key?)
+        result = select_value('SELECT `user_name` from users')
         value(result).must_equal('a user')
       end
     end
@@ -410,8 +407,7 @@
            :collate => nil,
          })
 
-        result = select_one('SELECT `ref` from users')
-        result = result['ref'] if result.respond_to?(:has_key?)
+        result = select_value('SELECT `ref` from users')
         value(result).must_equal(10)
       end
     end
@@ -437,8 +433,7 @@
            :collate => collation,
          })
 
-        result = select_one('SELECT `fnord` from users')
-        result = result['fnord'] if result.respond_to?(:has_key?)
+        result = select_value('SELECT `fnord` from users')
         assert_nil(result)
       end
     end
@@ -462,8 +457,7 @@
           :collate => collation,
         })
 
-        result = select_one('SELECT `user_name` from users')
-        result = result['user_name'] if result.respond_to?(:has_key?)
+        result = select_value('SELECT `user_name` from users')
         value(result).must_equal('a user')
       end
     end
@@ -489,8 +483,7 @@
           :collate => collation,
         })
 
-        result = select_one('SELECT `user_name` from users')
-        result = result['user_name'] if result.respond_to?(:has_key?)
+        result = select_value('SELECT `user_name` from users')
         value(result).must_equal('a user')
       end
     end