diff --git a/requirements.txt b/requirements.txt
index 4381c204..0227161b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 Pillow>=12.0.0
-openai>=2.9.0
+openai>=2.6.1
 
 # For iOS Support
 requests>=2.31.0
diff --git a/setup.py b/setup.py
index b35c2b19..fcdf499a 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@
     python_requires=">=3.10",
     install_requires=[
         "Pillow>=12.0.0",
-        "openai>=2.9.0",
+        "openai>=2.6.1",
     ],
     extras_require={
         "dev": [
diff --git a/tests/test_dependency_constraints.py b/tests/test_dependency_constraints.py
new file mode 100644
index 00000000..78d2acac
--- /dev/null
+++ b/tests/test_dependency_constraints.py
@@ -0,0 +1,36 @@
+import ast
+from pathlib import Path
+
+from packaging.requirements import Requirement
+from packaging.version import Version
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+SGLANG_PINNED_OPENAI_VERSION = Version("2.6.1")
+
+
+def _openai_requirement_from_requirements_txt() -> Requirement:
+    requirements_path = PROJECT_ROOT / "requirements.txt"
+    for line in requirements_path.read_text(encoding="utf-8").splitlines():
+        stripped = line.strip()
+        if stripped.startswith("openai"):
+            return Requirement(stripped)
+    raise AssertionError("requirements.txt does not declare openai")
+
+
+def _openai_requirement_from_setup_py() -> Requirement:
+    setup_tree = ast.parse((PROJECT_ROOT / "setup.py").read_text(encoding="utf-8"))
+    for node in ast.walk(setup_tree):
+        if isinstance(node, ast.keyword) and node.arg == "install_requires":
+            requirements = ast.literal_eval(node.value)
+            for requirement in requirements:
+                if requirement.startswith("openai"):
+                    return Requirement(requirement)
+    raise AssertionError("setup.py does not declare openai")
+
+
+def test_openai_dependency_allows_sglang_pinned_version() -> None:
+    for requirement in (
+        _openai_requirement_from_requirements_txt(),
+        _openai_requirement_from_setup_py(),
+    ):
+        assert SGLANG_PINNED_OPENAI_VERSION in requirement.specifier