diff --git a/pkgs/by-name/mn/mnamer/fix-requests-cache-version-check.patch b/pkgs/by-name/mn/mnamer/fix-requests-cache-version-check.patch
new file mode 100644
index 000000000000..2a29976187d0
--- /dev/null
+++ b/pkgs/by-name/mn/mnamer/fix-requests-cache-version-check.patch
@@ -0,0 +1,33 @@
+From 634d56361e967adcd81c3cb839458d3aea99e5db Mon Sep 17 00:00:00 2001
+From: Skid <26208369+skid9000@users.noreply.github.com>
+Date: Sun, 22 Feb 2026 20:28:03 +0100
+Subject: [PATCH] Fix requests_cache version check for 1.3.0
+
+Using the same method provided here : https://github.com/requests-cache/requests-cache/commit/61fae61e07222777eb26a6fb670c4ee6a9cdddb7
+---
+ mnamer/const.py | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/mnamer/const.py b/mnamer/const.py
+index 66510ebf..bf321f41 100644
+--- a/mnamer/const.py
++++ b/mnamer/const.py
+@@ -4,6 +4,7 @@
+ from pathlib import Path
+ from platform import platform, python_version
+ from sys import argv, gettrace, version_info
++from importlib.metadata import version as pkg_version, PackageNotFoundError
+ 
+ VERSION: str
+ 
+@@ -37,8 +38,8 @@
+     requests_version = "N/A"
+ 
+ try:
+-    from requests_cache import __version__ as requests_cache_version
+-except ModuleNotFoundError:
++    requests_cache_version = pkg_version('requests_cache')
++except PackageNotFoundError:
+     requests_cache_version = "N/A"
+ 
+ try:
diff --git a/pkgs/by-name/mn/mnamer/package.nix b/pkgs/by-name/mn/mnamer/package.nix
index d80ae16df58e..e4196ee96fbb 100644
--- a/pkgs/by-name/mn/mnamer/package.nix
+++ b/pkgs/by-name/mn/mnamer/package.nix
@@ -35,6 +35,8 @@ python3Packages.buildPythonApplication (finalAttrs: {
   patches = [
     # https://github.com/jkwill87/mnamer/pull/291
     ./cached_session_error.patch
+    # https://github.com/jkwill87/mnamer/pull/333
+    ./fix-requests-cache-version-check.patch
   ];
 
   nativeCheckInputs = [ python3Packages.pytestCheckHook ];
diff --git a/pkgs/by-name/op/open-web-calendar/package.nix b/pkgs/by-name/op/open-web-calendar/package.nix
index 7ea2c1781495..b63ad48acbd2 100644
--- a/pkgs/by-name/op/open-web-calendar/package.nix
+++ b/pkgs/by-name/op/open-web-calendar/package.nix
@@ -12,13 +12,13 @@ let
 in
 python.pkgs.buildPythonApplication (finalAttrs: {
   pname = "open-web-calendar";
-  version = "1.49";
+  version = "1.51";
   pyproject = true;
 
   src = fetchPypi {
     inherit (finalAttrs) version;
     pname = "open_web_calendar";
-    hash = "sha256-vtmIqiF85zn8CiMUWsCKJUzfiiK/j+xlZIyuIMGxR4I=";
+    hash = "sha256-r+7ZKdNOhjnjE1MBNAkni4Rrpx4DMRhUaP1Mmk5wzOo=";
   };
 
   # The Pypi tarball doesn't contain open_web_calendars/features
@@ -39,7 +39,6 @@ python.pkgs.buildPythonApplication (finalAttrs: {
   dependencies =
     with python.pkgs;
     [
-      flask-caching
       flask-allowed-hosts
       flask
       icalendar
@@ -48,6 +47,7 @@ python.pkgs.buildPythonApplication (finalAttrs: {
       bcrypt
       caldav
       requests
+      requests-cache
       pyyaml
       recurring-ical-events
       gunicorn
@@ -59,7 +59,10 @@ python.pkgs.buildPythonApplication (finalAttrs: {
     ]
     ++ requests.optional-dependencies.socks;
 
-  nativeCheckInputs = with python.pkgs; [ pytestCheckHook ];
+  nativeCheckInputs = with python.pkgs; [
+    pytestCheckHook
+    pytest-responses
+  ];
 
   enabledTestPaths = [ "open_web_calendar/test" ];
 
diff --git a/pkgs/development/python-modules/requests-cache/default.nix b/pkgs/development/python-modules/requests-cache/default.nix
index 329d359480a0..92d46c37db03 100644
--- a/pkgs/development/python-modules/requests-cache/default.nix
+++ b/pkgs/development/python-modules/requests-cache/default.nix
@@ -2,14 +2,13 @@
   lib,
   attrs,
   buildPythonPackage,
-  bson,
+  hatchling,
   boto3,
   botocore,
   cattrs,
   fetchFromGitHub,
   itsdangerous,
   platformdirs,
-  poetry-core,
   psutil,
   pymongo,
   pytestCheckHook,
@@ -23,27 +22,27 @@
   rich,
   tenacity,
   time-machine,
-  timeout-decorator,
   ujson,
+  orjson,
   urllib3,
   url-normalize,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "requests-cache";
-  version = "1.2.1";
+  version = "1.3.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "requests-cache";
     repo = "requests-cache";
-    tag = "v${version}";
-    hash = "sha256-juRCcBUr+Ko6kVPpUapwRbUGqWLKaRiCqppOc3S5FMU=";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-t9SJ+enZHHYPRXaSrPop2hVOagE4oMnuXExO2DeNttc=";
   };
 
-  nativeBuildInputs = [ poetry-core ];
+  build-system = [ hatchling ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     attrs
     cattrs
     platformdirs
@@ -57,12 +56,15 @@ buildPythonPackage rec {
       boto3
       botocore
     ];
-    mongodbo = [ pymongo ];
+    mongodb = [ pymongo ];
     redis = [ redis ];
-    bson = [ bson ];
-    json = [ ujson ];
     security = [ itsdangerous ];
     yaml = [ pyyaml ];
+    all = [
+      orjson
+      ujson
+    ]
+    ++ lib.concatAttrValues (lib.removeAttrs finalAttrs.optional-dependencies [ "all" ]);
   };
 
   nativeCheckInputs = [
@@ -75,10 +77,7 @@ buildPythonPackage rec {
     rich
     tenacity
     time-machine
-    timeout-decorator
-  ]
-  ++ optional-dependencies.json
-  ++ optional-dependencies.security;
+  ];
 
   preCheck = ''
     export HOME=$(mktemp -d);
@@ -90,11 +89,8 @@ buildPythonPackage rec {
   ];
 
   disabledTests = [
-    # Tests are flaky in the sandbox
-    "test_remove_expired_responses"
-    # Tests that broke with urllib 2.0.5
+    # Flaky
     "test_request_only_if_cached__stale_if_error__expired"
-    "test_stale_if_error__error_code"
   ];
 
   pythonImportsCheck = [ "requests_cache" ];
@@ -102,8 +98,8 @@ buildPythonPackage rec {
   meta = {
     description = "Persistent cache for requests library";
     homepage = "https://github.com/reclosedev/requests-cache";
-    changelog = "https://github.com/requests-cache/requests-cache/blob/v${version}/HISTORY.md";
+    changelog = "https://github.com/requests-cache/requests-cache/blob/$v{finalAttrs.version}/HISTORY.md";
     license = lib.licenses.bsd3;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})