diff --git a/changelog.rst b/changelog.rst
index 81fbefe78..99f63deb7 100644
--- a/changelog.rst
+++ b/changelog.rst
@@ -6,6 +6,13 @@ Features:
 * Add a ``\service`` prompt token for connections made using ``service=...``
   or ``PGSERVICE``. For example, set ``prompt = '\service> '``.
 
+Internal:
+---------
+* Require ``cli_helpers >= 2.15.2``. That release aligns vertical (expanded)
+  output by display width, so a header of wide characters like ``配列`` lines
+  up; ``test_format_array_output_expanded`` had the old misalignment written
+  down and fails with it.
+
 4.7.1 (2026-09-20)
 ==================
 
diff --git a/pyproject.toml b/pyproject.toml
index 1f21e60ea..71ee953ed 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ dependencies = [
     "psycopg-binary >= 3.0.14; sys_platform == 'win32'",
     "sqlparse >=0.3.0,<0.7",
     "configobj >= 5.0.6",
-    "cli_helpers[styles] >= 2.4.0",
+    "cli_helpers[styles] >= 2.15.2",
     # setproctitle is used to mask the password when running `ps` in command line.
     # But this is not necessary in Windows since the password is never shown in the
     # task manager. Also setproctitle is a hard dependency to install in Windows,
diff --git a/tests/test_main.py b/tests/test_main.py
index decae97b1..44dafd6d3 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -191,15 +191,16 @@ def test_format_array_output_expanded(executor):
     SELECT '{}', NULL, array[NULL]
     """
     results = run(executor, statement, expanded=True)
+    # 配列 is two wide characters: its padding counts display width (cli_helpers 2.15.2+).
     expected = [
         "-[ RECORD 1 ]-------------------------",
         "bigint_array         | {1,2,3}",
         "nested_numeric_array | {{1,2},{3,4}}",
-        "配列                   | {å,魚,текст}",
+        "配列                 | {å,魚,текст}",
         "-[ RECORD 2 ]-------------------------",
         "bigint_array         | {}",
         "nested_numeric_array | <null>",
-        "配列                   | {<null>}",
+        "配列                 | {<null>}",
         "SELECT 2",
     ]
     assert "\n".join(results) == "\n".join(expected)