diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f5cfbcb..6994d4c 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.25.1"
+  ".": "1.25.2"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e6e536..58a341b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.25.2 (2026-05-09)
+
+Full Changelog: [v1.25.1...v1.25.2](https://github.com/OneBusAway/python-sdk/compare/v1.25.1...v1.25.2)
+
+### Bug Fixes
+
+* **client:** add missing f-string prefix in file type error message ([7e64ef0](https://github.com/OneBusAway/python-sdk/commit/7e64ef0ae733fa7eaa144f6db52b504ec8cc9279))
+
 ## 1.25.1 (2026-05-01)
 
 Full Changelog: [v1.25.0...v1.25.1](https://github.com/OneBusAway/python-sdk/compare/v1.25.0...v1.25.1)
diff --git a/pyproject.toml b/pyproject.toml
index d677dcc..bb8625c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "onebusaway"
-version = "1.25.1"
+version = "1.25.2"
 description = "The official Python library for the onebusaway-sdk API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/onebusaway/_files.py b/src/onebusaway/_files.py
index 0fdce17..76da9e0 100644
--- a/src/onebusaway/_files.py
+++ b/src/onebusaway/_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/onebusaway/_version.py b/src/onebusaway/_version.py
index e618694..4dc7a91 100644
--- a/src/onebusaway/_version.py
+++ b/src/onebusaway/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "onebusaway"
-__version__ = "1.25.1"  # x-release-please-version
+__version__ = "1.25.2"  # x-release-please-version