diff --git a/pkgs/by-name/op/open-webui/package.nix b/pkgs/by-name/op/open-webui/package.nix
index fd35e2dbc70e..a51cb2a74d5b 100644
--- a/pkgs/by-name/op/open-webui/package.nix
+++ b/pkgs/by-name/op/open-webui/package.nix
@@ -7,19 +7,19 @@
 }:
 let
   pname = "open-webui";
-  version = "0.5.4";
+  version = "0.5.5";
 
   src = fetchFromGitHub {
     owner = "open-webui";
     repo = "open-webui";
     tag = "v${version}";
-    hash = "sha256-vlaJv4CbhjbJbiNZHKsedS2vBXp44oE/7ZALgkPASHI=";
+    hash = "sha256-4g+dt1dbN/ulERW3WLjTJ0++JD5NLREXjGu6ngPdxAI=";
   };
 
   frontend = buildNpmPackage {
     inherit pname version src;
 
-    npmDepsHash = "sha256-g47tK6BC6CE0hqdZbToQMB5QeNdufhO12xPrAjbfMTk=";
+    npmDepsHash = "sha256-cIocYy91JfcZM35ZiT6onEsz89qAZ+7jCjpjg6lV4pc=";
 
     # Disabling `pyodide:fetch` as it downloads packages during `buildPhase`
     # Until this is solved, running python packages from the browser will not work.
@@ -89,19 +89,21 @@ python312.pkgs.buildPythonApplication rec {
     flask-cors
     fpdf2
     ftfy
+    gcp-storage-emulator
     google-api-python-client
     google-auth-httplib2
     google-auth-oauthlib
+    google-cloud-storage
     google-generativeai
     googleapis-common-protos
     iso-639
     langchain
-    langchain-chroma
     langchain-community
     langdetect
     langfuse
     ldap3
     markdown
+    moto
     nltk
     openai
     opencv-python-headless
@@ -137,6 +139,7 @@ python312.pkgs.buildPythonApplication rec {
     sentence-transformers
     soundfile
     tiktoken
+    transformers
     unstructured
     uvicorn
     validators
diff --git a/pkgs/development/python-modules/gcp-storage-emulator/default.nix b/pkgs/development/python-modules/gcp-storage-emulator/default.nix
new file mode 100644
index 000000000000..ab67535edb8f
--- /dev/null
+++ b/pkgs/development/python-modules/gcp-storage-emulator/default.nix
@@ -0,0 +1,55 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  setuptools,
+  wheel,
+  flake8,
+  fs,
+  google-cloud-storage,
+  google-crc32c,
+  pytest,
+  pytestCheckHook,
+  pytest-cov,
+  requests,
+}:
+
+buildPythonPackage rec {
+  pname = "gcp-storage-emulator";
+  version = "2024.08.03";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "oittaa";
+    repo = "gcp-storage-emulator";
+    rev = "v${version}";
+    hash = "sha256-Lp9Wvod0wSE2+cnvLXguhagT30ax9TivyR8gC/kB7w0=";
+  };
+
+  build-system = [
+    setuptools
+    wheel
+  ];
+
+  nativeCheckInputs = [
+    flake8
+    fs
+    google-cloud-storage
+    google-crc32c
+    pytest
+    pytestCheckHook
+    pytest-cov
+    requests
+  ];
+
+  pythonImportsCheck = [
+    "gcp_storage_emulator"
+  ];
+
+  meta = {
+    description = "Local emulator for Google Cloud Storage";
+    homepage = "https://github.com/oittaa/gcp-storage-emulator";
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ drupol ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index aac99f5adafc..a7c82f7c4e0d 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5083,6 +5083,8 @@ self: super: with self; {
 
   gcovr = callPackage ../development/python-modules/gcovr { };
 
+  gcp-storage-emulator = callPackage ../development/python-modules/gcp-storage-emulator { };
+
   gcsa = callPackage ../development/python-modules/gcsa { };
 
   gcsfs = callPackage ../development/python-modules/gcsfs { };