diff --git a/pkgs/applications/networking/powerdns-admin/default.nix b/pkgs/applications/networking/powerdns-admin/default.nix
index 8cc2ec83cd50..8ea5c4904f11 100644
--- a/pkgs/applications/networking/powerdns-admin/default.nix
+++ b/pkgs/applications/networking/powerdns-admin/default.nix
@@ -1,12 +1,12 @@
 { lib, stdenv, fetchFromGitHub, mkYarnPackage, nixosTests, writeText, python3 }:
 
 let
-  version = "0.2.3";
+  version = "0.2.4";
   src = fetchFromGitHub {
     owner = "ngoduykhanh";
     repo = "PowerDNS-Admin";
     rev = "v${version}";
-    sha256 = "16faz57d77mxkflkvwyi8gb9wvnq2vhw79b84v1fmqvxri1yaphw";
+    sha256 = "sha256-xJ0NNnDVwGl+t9q1INPhCxcTmQayYBYdjEG0PbPCI9E=";
   };
 
   python = python3.override {
@@ -22,7 +22,7 @@ let
   };
 
   pythonDeps = with python.pkgs; [
-    flask flask_assets flask_login flask_sqlalchemy flask_migrate flask-seasurf flask_mail flask-sslify
+    flask flask_assets flask_login flask_sqlalchemy flask_migrate flask-seasurf flask_mail flask-session flask-sslify
     mysqlclient psycopg2 sqlalchemy
     cffi configobj cryptography bcrypt requests ldap pyotp qrcode dnspython
     gunicorn python3-saml pyopenssl pytz cssmin jsmin authlib bravado-core
@@ -125,6 +125,6 @@ in stdenv.mkDerivation rec {
     description = "A PowerDNS web interface with advanced features";
     homepage = "https://github.com/ngoduykhanh/PowerDNS-Admin";
     license = licenses.mit;
-    maintainers = with maintainers; [ zhaofengli ];
+    maintainers = with maintainers; [ Flakebi zhaofengli ];
   };
 }
diff --git a/pkgs/applications/networking/powerdns-admin/package.json b/pkgs/applications/networking/powerdns-admin/package.json
index cb21306308cf..84f495920744 100644
--- a/pkgs/applications/networking/powerdns-admin/package.json
+++ b/pkgs/applications/networking/powerdns-admin/package.json
@@ -12,5 +12,5 @@
     "multiselect": "^0.9.12"
   },
   "name": "powerdns-admin-assets",
-  "version": "0.2.3"
+  "version": "0.2.4"
 }
diff --git a/pkgs/applications/networking/powerdns-admin/yarndeps.nix b/pkgs/applications/networking/powerdns-admin/yarndeps.nix
index 02d9eb0046e3..7dcd54b53c21 100644
--- a/pkgs/applications/networking/powerdns-admin/yarndeps.nix
+++ b/pkgs/applications/networking/powerdns-admin/yarndeps.nix
@@ -114,11 +114,11 @@
       };
     }
     {
-      name = "bn.js___bn.js_4.11.9.tgz";
+      name = "bn.js___bn.js_4.12.0.tgz";
       path = fetchurl {
-        name = "bn.js___bn.js_4.11.9.tgz";
-        url  = "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.9.tgz";
-        sha1 = "26d556829458f9d1e81fc48952493d0ba3507828";
+        name = "bn.js___bn.js_4.12.0.tgz";
+        url  = "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz";
+        sha1 = "775b3f278efbb9718eec7361f483fb36fbbfea88";
       };
     }
     {
@@ -530,11 +530,11 @@
       };
     }
     {
-      name = "elliptic___elliptic_6.5.3.tgz";
+      name = "elliptic___elliptic_6.5.4.tgz";
       path = fetchurl {
-        name = "elliptic___elliptic_6.5.3.tgz";
-        url  = "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.3.tgz";
-        sha1 = "cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6";
+        name = "elliptic___elliptic_6.5.4.tgz";
+        url  = "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.4.tgz";
+        sha1 = "da37cebd31e79a1367e941b592ed1fbebd58abbb";
       };
     }
     {
diff --git a/pkgs/development/python-modules/flask-session/default.nix b/pkgs/development/python-modules/flask-session/default.nix
new file mode 100644
index 000000000000..a9433fe0b871
--- /dev/null
+++ b/pkgs/development/python-modules/flask-session/default.nix
@@ -0,0 +1,27 @@
+{ lib, fetchPypi, buildPythonPackage, pytestCheckHook, flask, cachelib }:
+
+buildPythonPackage rec {
+  pname = "Flask-Session";
+  version = "0.4.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-ye1UMh+oxMoBMv/TNpWCdZ7aclL7SzvuSA5pDRukH0Y=";
+  };
+
+  propagatedBuildInputs = [ flask cachelib ];
+
+  checkInputs = [ pytestCheckHook ];
+
+  # The rest of the tests require database servers and optional db connector dependencies
+  pytestFlagsArray = [ "-k" "'null_session or filesystem_session'" ];
+
+  pythonImportsCheck = [ "flask_session" ];
+
+  meta = with lib; {
+    description = "A Flask extension that adds support for server-side sessions";
+    homepage = "https://github.com/fengsp/flask-session";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ zhaofengli ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b56c7119a310..41656c24a549 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2877,6 +2877,8 @@ in {
 
   flask-seasurf = callPackage ../development/python-modules/flask-seasurf { };
 
+  flask-session = callPackage ../development/python-modules/flask-session { };
+
   flask-silk = callPackage ../development/python-modules/flask-silk { };
 
   flask-socketio = callPackage ../development/python-modules/flask-socketio { };