diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index c3829d83..b57b68f8 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.475.0"
+  ".": "0.475.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 87a1641b..cf0ffdb0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.475.1 (2026-04-10)
+
+Full Changelog: [v0.475.0...v0.475.1](https://github.com/Increase/increase-python/compare/v0.475.0...v0.475.1)
+
+### Bug Fixes
+
+* ensure file data are only sent as 1 parameter ([fd18a87](https://github.com/Increase/increase-python/commit/fd18a8751900131c922cf102dba6414ee184b3fb))
+
 ## 0.475.0 (2026-04-09)
 
 Full Changelog: [v0.474.0...v0.475.0](https://github.com/Increase/increase-python/compare/v0.474.0...v0.475.0)
diff --git a/pyproject.toml b/pyproject.toml
index 1bce2109..20bdf8a8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "increase"
-version = "0.475.0"
+version = "0.475.1"
 description = "The official Python library for the increase API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/increase/_utils/_utils.py b/src/increase/_utils/_utils.py
index eec7f4a1..63b8cd60 100644
--- a/src/increase/_utils/_utils.py
+++ b/src/increase/_utils/_utils.py
@@ -86,8 +86,9 @@ def _extract_items(
     index += 1
     if is_dict(obj):
         try:
-            # We are at the last entry in the path so we must remove the field
-            if (len(path)) == index:
+            # Remove the field if there are no more dict keys in the path,
+            # only "<array>" traversal markers or end.
+            if all(p == "<array>" for p in path[index:]):
                 item = obj.pop(key)
             else:
                 item = obj[key]
diff --git a/src/increase/_version.py b/src/increase/_version.py
index f083bb2e..a441cc9a 100644
--- a/src/increase/_version.py
+++ b/src/increase/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "increase"
-__version__ = "0.475.0"  # x-release-please-version
+__version__ = "0.475.1"  # x-release-please-version
diff --git a/tests/test_extract_files.py b/tests/test_extract_files.py
index 6f7d0b07..46d64967 100644
--- a/tests/test_extract_files.py
+++ b/tests/test_extract_files.py
@@ -35,6 +35,15 @@ def test_multiple_files() -> None:
     assert query == {"documents": [{}, {}]}
 
 
+def test_top_level_file_array() -> None:
+    query = {"files": [b"file one", b"file two"], "title": "hello"}
+    assert extract_files(query, paths=[["files", "<array>"]]) == [
+        ("files[]", b"file one"),
+        ("files[]", b"file two"),
+    ]
+    assert query == {"title": "hello"}
+
+
 @pytest.mark.parametrize(
     "query,paths,expected",
     [