diff --git a/.github/workflows/test_on_macos.yml b/.github/workflows/test_on_macos.yml
index aa2ae09c..29ed35e6 100644
--- a/.github/workflows/test_on_macos.yml
+++ b/.github/workflows/test_on_macos.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         ruby: ['3.2.9', '3.3.10', '3.4.8', '4.0.0', 'head']
-        duckdb: ['1.4.2', '1.3.2']
+        duckdb: ['1.4.3', '1.3.2']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/test_on_ubuntu.yml b/.github/workflows/test_on_ubuntu.yml
index b8868523..7a31a467 100644
--- a/.github/workflows/test_on_ubuntu.yml
+++ b/.github/workflows/test_on_ubuntu.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         ruby: ['3.2.9', '3.3.10', '3.4.8', '4.0.0', 'head']
-        duckdb: ['1.4.2', '1.3.2']
+        duckdb: ['1.4.3', '1.3.2']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/test_on_windows.yml b/.github/workflows/test_on_windows.yml
index 7c27e953..63594983 100644
--- a/.github/workflows/test_on_windows.yml
+++ b/.github/workflows/test_on_windows.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         ruby: ['3.2.9', '3.3.10', '3.4.8', 'ucrt', 'mingw', 'mswin', 'head']
-        duckdb: ['1.4.2', '1.3.2']
+        duckdb: ['1.4.3', '1.3.2']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1dc826d5..23237062 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 All notable changes to this project will be documented in this file.
 
 # Unreleased
+- bump duckdb to 1.4.3 on CI.
 
 # 1.4.2.0 - 2025-12-27
 - support Ruby 4.0.0, add Ruby 4.0.0 on CI.
diff --git a/test/duckdb_test/database_test.rb b/test/duckdb_test/database_test.rb
index c88ec13b..57d77775 100644
--- a/test/duckdb_test/database_test.rb
+++ b/test/duckdb_test/database_test.rb
@@ -39,7 +39,7 @@ def test_s_open_argument
 
     def test_s_open_with_config
       library_version = Gem::Version.new(DuckDB::LIBRARY_VERSION)
-      skip 'config test' if %w[1.4.0 1.4.1 1.4.2].include?(library_version.to_s)
+      skip 'config test' if %w[1.4.0 1.4.1 1.4.2 1.4.3].include?(library_version.to_s)
 
       config = DuckDB::Config.new
       config['default_order'] = 'DESC'