diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index da59f99e..3e2bf498 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.4.0"
+  ".": "0.4.1"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 1babc1d6..9ee1eaab 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 42
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/albot/albot-api-sdk-941030bccfdbff11e780db5e43f52356da4ee3e09ad0fc06a7ead290455888da.yml
-openapi_spec_hash: f81a1c30d8c9954b7b43ca33ad634c11
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/albot/albot-api-sdk-7cbbca66c58a467947b0ee616e19ae43cae0075709ea7479b68563403e9b36fc.yml
+openapi_spec_hash: c8a86ab1d25ca664694357f2dfb2305e
 config_hash: cdcae65deb496342d19067f314258060
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e0b64da..9e715f00 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.4.1 (2026-05-09)
+
+Full Changelog: [v0.4.0...v0.4.1](https://github.com/ALbot-developers/api-sdk-py/compare/v0.4.0...v0.4.1)
+
+### Bug Fixes
+
+* **client:** add missing f-string prefix in file type error message ([7896577](https://github.com/ALbot-developers/api-sdk-py/commit/789657772dade393bfbc9ece09a7a25b727d5f99))
+
 ## 0.4.0 (2026-05-03)
 
 Full Changelog: [v0.3.2...v0.4.0](https://github.com/ALbot-developers/api-sdk-py/compare/v0.3.2...v0.4.0)
diff --git a/pyproject.toml b/pyproject.toml
index 9b2c0007..c594ec3c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "albot_api_sdk"
-version = "0.4.0"
+version = "0.4.1"
 description = "The official Python library for the albot-api-sdk API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/albot_api_sdk/_files.py b/src/albot_api_sdk/_files.py
index 0fdce17b..76da9e08 100644
--- a/src/albot_api_sdk/_files.py
+++ b/src/albot_api_sdk/_files.py
@@ -99,7 +99,7 @@ async def async_to_httpx_files(files: RequestFiles | None) -> HttpxRequestFiles
     elif is_sequence_t(files):
         files = [(key, await _async_transform_file(file)) for key, file in files]
     else:
-        raise TypeError("Unexpected file type input {type(files)}, expected mapping or sequence")
+        raise TypeError(f"Unexpected file type input {type(files)}, expected mapping or sequence")
 
     return files
 
diff --git a/src/albot_api_sdk/_version.py b/src/albot_api_sdk/_version.py
index f0c58dcf..1a99048e 100644
--- a/src/albot_api_sdk/_version.py
+++ b/src/albot_api_sdk/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "albot_api_sdk"
-__version__ = "0.4.0"  # x-release-please-version
+__version__ = "0.4.1"  # x-release-please-version