diff --git a/pkgs/development/python-modules/python-picnic-api2/default.nix b/pkgs/development/python-modules/python-picnic-api2/default.nix
index 83bd486ef516..c2466eaddc56 100644
--- a/pkgs/development/python-modules/python-picnic-api2/default.nix
+++ b/pkgs/development/python-modules/python-picnic-api2/default.nix
@@ -4,23 +4,28 @@
   hatchling,
   lib,
   pytestCheckHook,
-  python-dotenv,
+  pythonAtLeast,
   requests,
   typing-extensions,
 }:
 
 buildPythonPackage rec {
   pname = "python-picnic-api2";
-  version = "1.3.2";
+  version = "1.3.4";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "codesalatdev";
     repo = "python-picnic-api";
     tag = "v${version}";
-    hash = "sha256-GFxs2ZjyGADMG8YWtpy+sAZClLOYt70KtEp5MCgY+7I=";
+    hash = "sha256-ytzzGr/z0jrsudtCBrcvGITo4DxxC8JCmSmQ8ybeomM=";
   };
 
+  postPatch = lib.optionalString (pythonAtLeast "3.14") ''
+    substituteInPlace tests/test_session.py \
+      --replace-fail '"Accept-Encoding": "gzip, deflate",' '"Accept-Encoding": "gzip, deflate, zstd",'
+  '';
+
   build-system = [ hatchling ];
 
   dependencies = [