diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index de44c40..8255acf 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.19.0"
+  ".": "1.19.1"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 5b8da89..7fc4abc 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 27
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/moderation-api/moderation-api-5d59d9b7fffd1ac6f329a62fdc42c97bfa7821168eeea0d686a2d48d90963c34.yml
-openapi_spec_hash: 61cd471624938b233f02dc17416946f2
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/moderation-api/moderation-api-e864d762f50e49c0584bbf35eacc43cdb1397f805cca52cb8d4c07781739d0a3.yml
+openapi_spec_hash: f511fefb34946e5878ac17f2b3056b1f
 config_hash: 9d144cc6c49d3fd53e5b4472c1e22165
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6498660..f3c51ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.19.1 (2026-05-09)
+
+Full Changelog: [v1.19.0...v1.19.1](https://github.com/moderation-api/sdk-python/compare/v1.19.0...v1.19.1)
+
+### Bug Fixes
+
+* **client:** add missing f-string prefix in file type error message ([3d020a4](https://github.com/moderation-api/sdk-python/commit/3d020a47af6b2155a6d09e4015b1e8da2c45c13d))
+
 ## 1.19.0 (2026-05-08)
 
 Full Changelog: [v1.18.0...v1.19.0](https://github.com/moderation-api/sdk-python/compare/v1.18.0...v1.19.0)
diff --git a/pyproject.toml b/pyproject.toml
index 6124771..138cf74 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "moderation_api"
-version = "1.19.0"
+version = "1.19.1"
 description = "The official Python library for the moderation-api API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/moderation_api/_files.py b/src/moderation_api/_files.py
index 0fdce17..76da9e0 100644
--- a/src/moderation_api/_files.py
+++ b/src/moderation_api/_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/moderation_api/_version.py b/src/moderation_api/_version.py
index 6d652ff..38b1691 100644
--- a/src/moderation_api/_version.py
+++ b/src/moderation_api/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "moderation_api"
-__version__ = "1.19.0"  # x-release-please-version
+__version__ = "1.19.1"  # x-release-please-version