diff --git a/python-overlay.nix b/python-overlay.nix
index 8951ea3..f521d65 100644
--- a/python-overlay.nix
+++ b/python-overlay.nix
@@ -12,22 +12,30 @@ final: prev: {
       honcho = pyFinal.callPackage ./python/honcho.nix {};
 
       # erpnext dependencies
-      gocardless-pro = pyFinal.callPackage ./python/gocardless-pro.nix {};
-      redisearch = pyFinal.callPackage ./python/redisearch.nix {};
-      taxjar = pyFinal.callPackage ./python/taxjar.nix {};
+      barcodenumber = pyFinal.callPackage ./python/barcodenumber.nix {};
 
       # frappe dependencies
       email-reply-parser = pyFinal.callPackage ./python/email-reply-parser.nix {};
       maxminddb-geolite2 = pyFinal.callPackage ./python/maxminddb-geolite2.nix {};
       psycopg2-binary = pyFinal.callPackage ./python/psycopg2-binary.nix {};
       traceback-with-variables = pyFinal.callPackage ./python/traceback-with-variables.nix {};
+      pydantic = pyFinal.callPackage ./python/pydantic.nix {};
 
-      # indirect dependencies
-      # taxjar
-      jsonobject = pyFinal.callPackage ./python/jsonobject.nix {};
-      # redisearch
-      rejson = pyFinal.callPackage ./python/rejson.nix {};
+      versioningit = pyPrev.versioningit.overridePythonAttrs (oldAttrs: (rec {
+        version = "2.2.1";
+        src = pyPrev.fetchPypi {
+          inherit version;
+          inherit (oldAttrs) pname;
+          hash = "sha256-DlgkLXq9phrmNZalSUrp7WMayF2Ls8yOF24yU8pLy7U=";
+        };
+      }));
 
+      fastapi = pyPrev.fastapi.overridePythonAttrs (oldAttrs: (rec {
+        propagatedBuildInputs = oldAttrs.propagatedBuildInputs ++ [
+          pyPrev.pydantic-settings
+          pyPrev.pydantic-extra-types
+        ];
+      }));
 
       plaid-python = pyPrev.plaid-python.overridePythonAttrs (oldAttrs: (rec {
         version = "7.2.1";
diff --git a/python/barcodenumber.nix b/python/barcodenumber.nix
new file mode 100644
index 0000000..1dc0d58
--- /dev/null
+++ b/python/barcodenumber.nix
@@ -0,0 +1,15 @@
+{
+  buildPythonPackage,
+  fetchPypi,
+}:
+buildPythonPackage rec {
+  pname = "barcodenumber";
+  version = "0.2.1";
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-nW8+m32i42kLR4oC4lrKoBkFYgKHgpZPGAFNJvtLMhc=";
+  };
+  propagatedBuildInputs = [  ];
+  nativeBuildInputs = [ ];
+  doCheck = false;
+}
diff --git a/python/erpnext.nix b/python/erpnext.nix
index 3f45bd9..093430d 100644
--- a/python/erpnext.nix
+++ b/python/erpnext.nix
@@ -6,18 +6,16 @@
 
 # Core dependencies
 , pycountry
-, python-stdnum
 , unidecode
-, redisearch
+, barcodenumber
 , rapidfuzz
+, holidays
 
 # Integration dependencies
-, gocardless-pro
 , googlemaps
 , plaid-python
 , python-youtube
-, taxjar
-, tweepy
+, pypng
 }:
 let
   pinData = import ../srcs/pin.nix;
@@ -47,17 +45,16 @@ buildPythonPackage rec {
   propagatedBuildInputs = [
     # Core dependencies
     pycountry
-    python-stdnum
     unidecode
-    redisearch
+    barcodenumber
     rapidfuzz
+    holidays
 
     # Integration dependencies
-    gocardless-pro
     googlemaps
     plaid-python
     python-youtube
-    taxjar
-    tweepy
+    # used for QR code generation
+    pypng
   ];
 }
diff --git a/python/frappe.nix b/python/frappe.nix
index 9cf6fb3..a36e516 100644
--- a/python/frappe.nix
+++ b/python/frappe.nix
@@ -8,12 +8,13 @@
 , babel
 , click
 , filelock
+, filetype
 , gitpython
 , jinja2
 , pillow
 , pyjwt
 , pymysql
-, pypdf2
+, pypdf
 , pypika
 , pyqrcode
 , pyyaml
@@ -30,7 +31,6 @@
 , cryptography
 , email-reply-parser
 , git-url-parse
-, gitdb
 , gunicorn
 , html5lib
 , ipython
@@ -47,12 +47,9 @@
 , premailer
 , psutil
 , psycopg2-binary
-, pyasn1
-, pycountry
-, pycryptodome
+, pydantic
 , pyopenssl
 , pyotp
-, pypng
 , python-dateutil
 , pytz
 , rauth
@@ -63,11 +60,11 @@
 , rq
 , rsa
 , semantic-version
+, sentry-sdk
 , sqlparse
 , tenacity
 , terminaltables
 , traceback-with-variables
-, urllib3
 , xlrd
 , zxcvbn
 , markdownify
@@ -76,7 +73,6 @@
 , boto3
 , dropbox
 , google-api-python-client
-, google-auth-httplib2
 , google-auth-oauthlib
 , google-auth
 , posthog
@@ -100,48 +96,18 @@ buildPythonPackage rec {
   format = "pyproject";
 
   nativeBuildInputs = [ pythonRelaxDepsHook flit-core ];
-  pythonRelaxDeps = [
-    "Babel"
-    "beautifulsoup4"
-    "boto3"
-    "cairocffi"
-    "Click"
-    "croniter"
-    "cryptography"
-    "filelock"
-    "google-api-python-client"
-    "google-auth"
-    "hiredis"
-    "ipython"
-    "openpyxl"
-    "phonenumbers"
-    "Pillow"
-    "pyasn1"
-    "pycountry"
-    "pycryptodome"
-    "PyJWT"
-    "PyMySQL"
-    "pyOpenSSL"
-    "pyotp"
-    "pypng"
-    "pytz"
-    "redis"
-    "requests"
-    "rq"
-    "tenacity"
-    "WeasyPrint"
-  ];
 
   propagatedBuildInputs = [
     babel
     click
     filelock
+    filetype
     gitpython
     jinja2
     pillow
     pyjwt
     pymysql
-    pypdf2
+    pypdf
     pypika
     pyqrcode
     pyyaml
@@ -158,7 +124,6 @@ buildPythonPackage rec {
     cryptography
     email-reply-parser
     git-url-parse
-    gitdb
     gunicorn
     html5lib
     ipython
@@ -175,12 +140,9 @@ buildPythonPackage rec {
     premailer
     psutil
     psycopg2-binary
-    pyasn1
-    pycountry
-    pycryptodome
+    pydantic
     pyopenssl
     pyotp
-    pypng
     python-dateutil
     pytz
     rauth
@@ -191,11 +153,11 @@ buildPythonPackage rec {
     rq
     rsa
     semantic-version
+    sentry-sdk
     sqlparse
     tenacity
     terminaltables
     traceback-with-variables
-    urllib3
     xlrd
     zxcvbn
     markdownify
@@ -204,7 +166,6 @@ buildPythonPackage rec {
     boto3
     dropbox
     google-api-python-client
-    google-auth-httplib2
     google-auth-oauthlib
     google-auth
     posthog
diff --git a/python/gocardless-pro.nix b/python/gocardless-pro.nix
deleted file mode 100644
index 77907d0..0000000
--- a/python/gocardless-pro.nix
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-  buildPythonPackage,
-  fetchPypi,
-  requests,
-  six
-}:
-buildPythonPackage rec {
-  pname = "gocardless-pro";
-  version = "1.22.0";
-  src = fetchPypi {
-    pname = "gocardless_pro";
-    inherit version;
-    sha256 = "sha256-i4gBeJvl/aCujeXGvJG+z1Wp2aczKg8clnfMyK8fz/w=";
-  };
-  propagatedBuildInputs = [
-    requests
-    six
-  ];
-}
diff --git a/python/jsonobject.nix b/python/jsonobject.nix
deleted file mode 100644
index 8751792..0000000
--- a/python/jsonobject.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-{
-  buildPythonPackage,
-  fetchPypi,
-  cython,
-  six
-}:
-buildPythonPackage rec {
-  pname = "jsonobject";
-  version = "2.1.0";
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "sha256-UpijeVA+Q+/Aq0AC10LA/LuhqWKO3azE6lR7cThRRGY=";
-  };
-  propagatedBuildInputs = [ six ];
-  nativeBuildInputs = [ cython ];
-  doCheck = false;
-}
diff --git a/python/pydantic.nix b/python/pydantic.nix
new file mode 100644
index 0000000..1370f58
--- /dev/null
+++ b/python/pydantic.nix
@@ -0,0 +1,85 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+, hatchling
+, hatch-fancy-pypi-readme
+, libxcrypt
+, annotated-types
+, pydantic-core
+, typing-extensions
+, email-validator
+, dirty-equals
+, faker
+, pytestCheckHook
+, pytest-mock
+}:
+
+buildPythonPackage rec {
+  pname = "pydantic";
+  version = "2.3.0";
+  pyproject = true;
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "pydantic";
+    repo = "pydantic";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-toqrWg8bYzc3UmvG/YmXawfmT8nqaA9fxy24k1cdj+M=";
+  };
+
+  buildInputs = lib.optionals (pythonOlder "3.9") [
+    libxcrypt
+  ];
+
+  nativeBuildInputs = [
+    hatch-fancy-pypi-readme
+    hatchling
+  ];
+
+  propagatedBuildInputs = [
+    annotated-types
+    pydantic-core
+    typing-extensions
+  ];
+
+  passthru.optional-dependencies = {
+    email = [
+      email-validator
+    ];
+  };
+
+  nativeCheckInputs = [
+    dirty-equals
+    faker
+    pytest-mock
+    pytestCheckHook
+  ] ++ lib.flatten (lib.attrValues passthru.optional-dependencies);
+
+  preCheck = ''
+    export HOME=$(mktemp -d)
+    substituteInPlace pyproject.toml \
+      --replace "'--benchmark-columns', 'min,mean,stddev,outliers,rounds,iterations'," "" \
+      --replace "'--benchmark-group-by', 'group'," "" \
+      --replace "'--benchmark-warmup', 'on'," "" \
+      --replace "'--benchmark-disable'," ""
+  '';
+
+  disabledTestPaths = [
+    "tests/benchmarks"
+
+    # avoid cyclic dependency
+    "tests/test_docs.py"
+  ];
+
+  pythonImportsCheck = [ "pydantic" ];
+
+  meta = with lib; {
+    description = "Data validation and settings management using Python type hinting";
+    homepage = "https://github.com/pydantic/pydantic";
+    changelog = "https://github.com/pydantic/pydantic/blob/v${version}/HISTORY.md";
+    license = licenses.mit;
+    maintainers = with maintainers; [ wd15 ];
+  };
+}
diff --git a/python/redisearch.nix b/python/redisearch.nix
deleted file mode 100644
index 7c0c7a1..0000000
--- a/python/redisearch.nix
+++ /dev/null
@@ -1,28 +0,0 @@
-{ buildPythonPackage
-, fetchPypi
-, pythonRelaxDepsHook
-, unittestCheckHook
-, redis
-, rejson
-, hiredis
-}:
-buildPythonPackage rec {
-  pname = "redisearch";
-  version = "2.1.1";
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "sha256-V1rNWhOhB/8AXUVyoTa1A7Evpb8mr8N70R9qkj8exzw=";
-  };
-  nativeBuildInputs = [ pythonRelaxDepsHook ];
-  pythonRelaxDeps = [
-    "redis"
-  ];
-  propagatedBuildInputs = [
-    redis
-    rejson
-    hiredis
-  ];
-  nativeCheckInputs = [
-    unittestCheckHook
-  ];
-}
diff --git a/python/rejson.nix b/python/rejson.nix
deleted file mode 100644
index 3e72a45..0000000
--- a/python/rejson.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-{ buildPythonPackage
-, pythonRelaxDepsHook
-, unittestCheckHook
-, fetchPypi
-, redis
-, six
-}:
-buildPythonPackage rec {
-  pname = "rejson";
-  version = "0.5.6";
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "sha256-vs3hNSAAUAi3ls5WyxKOsiUC18addIJv81HNQ79zvJc=";
-  };
-  nativeBuildInputs = [ pythonRelaxDepsHook ];
-  pythonRelaxDeps = [
-    "redis"
-  ];
-  propagatedBuildInputs = [
-    redis
-    six
-  ];
-  doCheck = false;
-}
diff --git a/python/taxjar.nix b/python/taxjar.nix
deleted file mode 100644
index 611d28b..0000000
--- a/python/taxjar.nix
+++ /dev/null
@@ -1,22 +0,0 @@
-{
-  buildPythonPackage,
-  fetchPypi,
-  jsonobject,
-  requests,
-  mock
-}:
-buildPythonPackage rec {
-  pname = "taxjar";
-  version = "1.9.2";
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "sha256-c8lkCLzEmNTuBYLyVNRQq4SLSveDpNKKf6NHxHpg7Ec=";
-  };
-  propagatedBuildInputs = [
-    jsonobject
-    requests
-  ];
-  checkInputs = [
-    mock
-  ];
-}