diff --git a/liberapay/elsewhere/_base.py b/liberapay/elsewhere/_base.py
index 9a3b2fe4c..93dfd5f18 100644
--- a/liberapay/elsewhere/_base.py
+++ b/liberapay/elsewhere/_base.py
@@ -1,5 +1,6 @@
 from dataclasses import dataclass
 from datetime import datetime, timezone
+from functools import cached_property
 import hashlib
 import json
 import logging
@@ -9,7 +10,6 @@
 import xml.etree.ElementTree as ET
 
 from babel.dates import format_timedelta
-from cached_property import cached_property
 from dateutil.parser import parse as parse_date
 from pando.utils import utc
 from oauthlib.oauth2 import BackendApplicationClient, InvalidGrantError, TokenExpiredError
diff --git a/liberapay/i18n/base.py b/liberapay/i18n/base.py
index 7aa2e6ca9..8770df1c1 100644
--- a/liberapay/i18n/base.py
+++ b/liberapay/i18n/base.py
@@ -1,6 +1,7 @@
 from collections import namedtuple
 from datetime import date, datetime, timedelta
 from decimal import Decimal, InvalidOperation
+from functools import cached_property
 from sys import intern
 from unicodedata import combining, normalize
 import warnings
@@ -9,7 +10,6 @@
 from babel.dates import format_date, format_datetime, format_time, format_timedelta
 from babel.messages.pofile import Catalog
 from babel.numbers import parse_pattern
-from cached_property import cached_property
 from markupsafe import Markup
 import opencc
 from pando.utils import utcnow
diff --git a/liberapay/models/exchange_route.py b/liberapay/models/exchange_route.py
index d1df9bf7d..43f14e777 100644
--- a/liberapay/models/exchange_route.py
+++ b/liberapay/models/exchange_route.py
@@ -1,7 +1,7 @@
 from calendar import monthrange
 from datetime import date
+from functools import cached_property
 
-from cached_property import cached_property
 from postgres.orm import Model
 import stripe
 
diff --git a/liberapay/models/participant.py b/liberapay/models/participant.py
index e28d7f561..5d99bfb76 100644
--- a/liberapay/models/participant.py
+++ b/liberapay/models/participant.py
@@ -3,6 +3,7 @@
 from datetime import date, timedelta
 from decimal import Decimal
 from email.utils import formataddr
+from functools import cached_property
 from hashlib import pbkdf2_hmac, md5, sha1
 from operator import attrgetter, itemgetter
 from os import urandom
@@ -15,7 +16,6 @@
 import uuid
 
 import aspen_jinja2_renderer
-from cached_property import cached_property
 from dateutil.parser import parse as parse_date
 from dns.exception import DNSException
 from dns.resolver import Cache as DNSCache, Resolver as DNSResolver
diff --git a/liberapay/models/tip.py b/liberapay/models/tip.py
index 75dabc480..0c62ebf08 100644
--- a/liberapay/models/tip.py
+++ b/liberapay/models/tip.py
@@ -1,6 +1,6 @@
 from datetime import timedelta
+from functools import cached_property
 
-from cached_property import cached_property
 from postgres.orm import Model
 
 
diff --git a/liberapay/website.py b/liberapay/website.py
index a97a699bc..9b16b44b8 100644
--- a/liberapay/website.py
+++ b/liberapay/website.py
@@ -5,10 +5,10 @@
 
 from contextvars import ContextVar, copy_context
 from datetime import timedelta
+from functools import cached_property
 import logging
 import os
 
-from cached_property import cached_property
 from environment import Environment, is_yesish
 from markupsafe import Markup
 from pando.utils import utcnow
diff --git a/requirements_base.txt b/requirements_base.txt
index ac9b718d7..ae0f1d3c4 100644
--- a/requirements_base.txt
+++ b/requirements_base.txt
@@ -541,10 +541,6 @@ boto3==1.35.13 \
         --hash=sha256:263ed587a5803c6c708d3ce44dc4dfedaab4c1a32e8329bab818933d79ddcf5d \
         --hash=sha256:4f50ed74ab84d474ce614475e0b8d5047ff080810aac5d01ea25231cfc944b0c
 
-cached-property==1.5.2 \
-    --hash=sha256:9fa5755838eecbb2d234c3aa390bd80fbd3ac6b6869109bfc1b499f7bd89a130 \
-    --hash=sha256:df4f613cf7ad9a588cc381aaf4a512d26265ecebd5eb9e1ba12f1319eb85a6a0
-
 stripe==11.1.1 \
     --hash=sha256:0bbdfe54a09728fc54db6bb099b2f440ffc111d07d9674b0f04bfd0d3c1cbdcf \
     --hash=sha256:e79e02238d0ec7c89a64986af941dcae41e4857489b7cc83497acce9def356e5